Differentialgleichungen
About points...
We associate a certain number of points with each exercise.
When you click an exercise into a collection, this number will be taken as points for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit the number of points for the exercise in the collection independently, without any effect on "points by default" as represented by the number here.
That being said... How many "default points" should you associate with an exercise upon creation?
As with difficulty, there is no straight forward and generally accepted way.
But as a guideline, we tend to give as many points by default as there are mathematical steps to do in the exercise.
Again, very vague... But the number should kind of represent the "work" required.
When you click an exercise into a collection, this number will be taken as points for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit the number of points for the exercise in the collection independently, without any effect on "points by default" as represented by the number here.
That being said... How many "default points" should you associate with an exercise upon creation?
As with difficulty, there is no straight forward and generally accepted way.
But as a guideline, we tend to give as many points by default as there are mathematical steps to do in the exercise.
Again, very vague... But the number should kind of represent the "work" required.
About difficulty...
We associate a certain difficulty with each exercise.
When you click an exercise into a collection, this number will be taken as difficulty for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit its difficulty in the collection independently, without any effect on the "difficulty by default" here.
Why we use chess pieces? Well... we like chess, we like playing around with \(\LaTeX\)-fonts, we wanted symbols that need less space than six stars in a table-column... But in your layouts, you are of course free to indicate the difficulty of the exercise the way you want.
That being said... How "difficult" is an exercise? It depends on many factors, like what was being taught etc.
In physics exercises, we try to follow this pattern:
Level 1 - One formula (one you would find in a reference book) is enough to solve the exercise. Example exercise
Level 2 - Two formulas are needed, it's possible to compute an "in-between" solution, i.e. no algebraic equation needed. Example exercise
Level 3 - "Chain-computations" like on level 2, but 3+ calculations. Still, no equations, i.e. you are not forced to solve it in an algebraic manner. Example exercise
Level 4 - Exercise needs to be solved by algebraic equations, not possible to calculate numerical "in-between" results. Example exercise
Level 5 -
Level 6 -
When you click an exercise into a collection, this number will be taken as difficulty for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit its difficulty in the collection independently, without any effect on the "difficulty by default" here.
Why we use chess pieces? Well... we like chess, we like playing around with \(\LaTeX\)-fonts, we wanted symbols that need less space than six stars in a table-column... But in your layouts, you are of course free to indicate the difficulty of the exercise the way you want.
That being said... How "difficult" is an exercise? It depends on many factors, like what was being taught etc.
In physics exercises, we try to follow this pattern:
Level 1 - One formula (one you would find in a reference book) is enough to solve the exercise. Example exercise
Level 2 - Two formulas are needed, it's possible to compute an "in-between" solution, i.e. no algebraic equation needed. Example exercise
Level 3 - "Chain-computations" like on level 2, but 3+ calculations. Still, no equations, i.e. you are not forced to solve it in an algebraic manner. Example exercise
Level 4 - Exercise needs to be solved by algebraic equations, not possible to calculate numerical "in-between" results. Example exercise
Level 5 -
Level 6 -
Question
Solution
Short
Video
\(\LaTeX\)
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Exercise:
abcliste %a abc In der folgen Abbildung sind vier Richtungsfelder A B C und D dargestellt. Ordne jedem Richtungsfeld die passe Differentialgleichung aus der untenstehen Liste zu. Zwei Differentialgleichungen bleiben übrig. center setlengthtabcolseppt tabular*linewidthl@extracolsepfillccc % Feld A: y' x tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleA xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+x^ vx/sqrt+x^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+x^ v-x/sqrt+x^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture & % Feld B: y' -y tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleB xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+y^ v-y/sqrt+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+y^ vy/sqrt+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture & % Feld C: y' sinx tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleC xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+sindegx^ vsindegx/sqrt+sindegx^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+sindegx^ v-sindegx/sqrt+sindegx^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture & % Feld D: y' x + y tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleD xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+x+y^ vx+y/sqrt+x+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+x+y^ v-x+y/sqrt+x+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture tabular* center enumeratelabelarabic* itemseppt tabularxtextwidthXXX item y' sinx & item y' fracyx & item y' x + y item y' -y & item y' cosy & item y' x tabularx enumerate textitHinweis: Gib deine Antwort in der Form BuchstabZahl an. Es sind keine Begründungen erforderlich. %b abc Bestimme die Partikulärlösung des folgen Anfangswertproblems durch Separation der Variablen: y' frac+y^x quad textmit quad y abc Bestimme die allgemeine Lösung der folgen inhomogenen linearen Differentialgleichung zweiter Ordnung mit konstanten Koeffizienten: y'' + y' - y cosx abcliste
Solution:
abcliste abc A- B- C- D-. hfill . Pkt./richtige Antwort abc Separation: frac+y^ dy fracx dx implies arctany ln|x| + C. Anfangswert y : arctan ln + C implies + C implies C . Lösung: yx tanln|x|. abc . Homogene Lösung y'' + y' - y : Charakteristische Gleichung: lambda^ + lambda - implies lambda+lambda- . hfill. Pkt Eigenwerte: lambda_ - lambda_ . hfill. Pkt Allgemeine homogene Lösung: y_hx C_ e^-x + C_ e^x. hfill. Pkt . Partikuläre Lösung y_p: Ansatz: y_px Acosx + Bsinx. hfill. Pkt Ableitungen bilden: y_p'x -Asinx + Bcosx y_p''x -Acosx - Bsinx. hfill. Pkt Einsetzen in die Differentialgleichung und Sortieren: -A + B - Acosx + -B - A - Bsinx cosx -A + Bcosx + -A - Bsinx cosx. hfill. Pkt Koeffizientenvergleich und Lösen des Gleichungssystems: I -A + B II -A - B implies A -B Einsetzen von II in I: B + B implies B und A -. Somit: y_px -cosx + sinx. hfill. Pkt . Allgemeine Lösung y y_h + y_p: yx C_ e^-x + C_ e^x - cosx + sinx. hfill. Pkt abcliste
abcliste %a abc In der folgen Abbildung sind vier Richtungsfelder A B C und D dargestellt. Ordne jedem Richtungsfeld die passe Differentialgleichung aus der untenstehen Liste zu. Zwei Differentialgleichungen bleiben übrig. center setlengthtabcolseppt tabular*linewidthl@extracolsepfillccc % Feld A: y' x tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleA xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+x^ vx/sqrt+x^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+x^ v-x/sqrt+x^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture & % Feld B: y' -y tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleB xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+y^ v-y/sqrt+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+y^ vy/sqrt+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture & % Feld C: y' sinx tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleC xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+sindegx^ vsindegx/sqrt+sindegx^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+sindegx^ v-sindegx/sqrt+sindegx^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture & % Feld D: y' x + y tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleD xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+x+y^ vx+y/sqrt+x+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+x+y^ v-x+y/sqrt+x+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture tabular* center enumeratelabelarabic* itemseppt tabularxtextwidthXXX item y' sinx & item y' fracyx & item y' x + y item y' -y & item y' cosy & item y' x tabularx enumerate textitHinweis: Gib deine Antwort in der Form BuchstabZahl an. Es sind keine Begründungen erforderlich. %b abc Bestimme die Partikulärlösung des folgen Anfangswertproblems durch Separation der Variablen: y' frac+y^x quad textmit quad y abc Bestimme die allgemeine Lösung der folgen inhomogenen linearen Differentialgleichung zweiter Ordnung mit konstanten Koeffizienten: y'' + y' - y cosx abcliste
Solution:
abcliste abc A- B- C- D-. hfill . Pkt./richtige Antwort abc Separation: frac+y^ dy fracx dx implies arctany ln|x| + C. Anfangswert y : arctan ln + C implies + C implies C . Lösung: yx tanln|x|. abc . Homogene Lösung y'' + y' - y : Charakteristische Gleichung: lambda^ + lambda - implies lambda+lambda- . hfill. Pkt Eigenwerte: lambda_ - lambda_ . hfill. Pkt Allgemeine homogene Lösung: y_hx C_ e^-x + C_ e^x. hfill. Pkt . Partikuläre Lösung y_p: Ansatz: y_px Acosx + Bsinx. hfill. Pkt Ableitungen bilden: y_p'x -Asinx + Bcosx y_p''x -Acosx - Bsinx. hfill. Pkt Einsetzen in die Differentialgleichung und Sortieren: -A + B - Acosx + -B - A - Bsinx cosx -A + Bcosx + -A - Bsinx cosx. hfill. Pkt Koeffizientenvergleich und Lösen des Gleichungssystems: I -A + B II -A - B implies A -B Einsetzen von II in I: B + B implies B und A -. Somit: y_px -cosx + sinx. hfill. Pkt . Allgemeine Lösung y y_h + y_p: yx C_ e^-x + C_ e^x - cosx + sinx. hfill. Pkt abcliste
Meta Information
Exercise:
abcliste %a abc In der folgen Abbildung sind vier Richtungsfelder A B C und D dargestellt. Ordne jedem Richtungsfeld die passe Differentialgleichung aus der untenstehen Liste zu. Zwei Differentialgleichungen bleiben übrig. center setlengthtabcolseppt tabular*linewidthl@extracolsepfillccc % Feld A: y' x tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleA xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+x^ vx/sqrt+x^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+x^ v-x/sqrt+x^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture & % Feld B: y' -y tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleB xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+y^ v-y/sqrt+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+y^ vy/sqrt+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture & % Feld C: y' sinx tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleC xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+sindegx^ vsindegx/sqrt+sindegx^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+sindegx^ v-sindegx/sqrt+sindegx^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture & % Feld D: y' x + y tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleD xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+x+y^ vx+y/sqrt+x+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+x+y^ v-x+y/sqrt+x+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture tabular* center enumeratelabelarabic* itemseppt tabularxtextwidthXXX item y' sinx & item y' fracyx & item y' x + y item y' -y & item y' cosy & item y' x tabularx enumerate textitHinweis: Gib deine Antwort in der Form BuchstabZahl an. Es sind keine Begründungen erforderlich. %b abc Bestimme die Partikulärlösung des folgen Anfangswertproblems durch Separation der Variablen: y' frac+y^x quad textmit quad y abc Bestimme die allgemeine Lösung der folgen inhomogenen linearen Differentialgleichung zweiter Ordnung mit konstanten Koeffizienten: y'' + y' - y cosx abcliste
Solution:
abcliste abc A- B- C- D-. hfill . Pkt./richtige Antwort abc Separation: frac+y^ dy fracx dx implies arctany ln|x| + C. Anfangswert y : arctan ln + C implies + C implies C . Lösung: yx tanln|x|. abc . Homogene Lösung y'' + y' - y : Charakteristische Gleichung: lambda^ + lambda - implies lambda+lambda- . hfill. Pkt Eigenwerte: lambda_ - lambda_ . hfill. Pkt Allgemeine homogene Lösung: y_hx C_ e^-x + C_ e^x. hfill. Pkt . Partikuläre Lösung y_p: Ansatz: y_px Acosx + Bsinx. hfill. Pkt Ableitungen bilden: y_p'x -Asinx + Bcosx y_p''x -Acosx - Bsinx. hfill. Pkt Einsetzen in die Differentialgleichung und Sortieren: -A + B - Acosx + -B - A - Bsinx cosx -A + Bcosx + -A - Bsinx cosx. hfill. Pkt Koeffizientenvergleich und Lösen des Gleichungssystems: I -A + B II -A - B implies A -B Einsetzen von II in I: B + B implies B und A -. Somit: y_px -cosx + sinx. hfill. Pkt . Allgemeine Lösung y y_h + y_p: yx C_ e^-x + C_ e^x - cosx + sinx. hfill. Pkt abcliste
abcliste %a abc In der folgen Abbildung sind vier Richtungsfelder A B C und D dargestellt. Ordne jedem Richtungsfeld die passe Differentialgleichung aus der untenstehen Liste zu. Zwei Differentialgleichungen bleiben übrig. center setlengthtabcolseppt tabular*linewidthl@extracolsepfillccc % Feld A: y' x tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleA xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+x^ vx/sqrt+x^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+x^ v-x/sqrt+x^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture & % Feld B: y' -y tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleB xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+y^ v-y/sqrt+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+y^ vy/sqrt+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture & % Feld C: y' sinx tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleC xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+sindegx^ vsindegx/sqrt+sindegx^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+sindegx^ v-sindegx/sqrt+sindegx^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture & % Feld D: y' x + y tikzpicturebaselinecurrent bounding box.north axis width.cm height.cm axis linesmiddle xmin-. xmax. ymin-. ymax. xtick--- ytick--- gridboth titleD xticklabel stylefonttiny yshiftpt yticklabel stylefonttiny xshiftpt view xlabelx ylabely xlabel styleatticklabel* cs: anchornorth east fonttiny xshiftpt ylabel styleatticklabel* cs: anchorsouth east fonttiny yshift-pt addplotblue thick quiveru/sqrt+x+y^ vx+y/sqrt+x+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue thick quiveru-/sqrt+x+y^ v-x+y/sqrt+x+y^ scale arrows. every arrow/.app styl samples samples y domain-: y domain-: ; addplotblue only marks mark* mark size.pt mark optionsfillwhite drawblue samples samples y domain-: y domain-: ; axis tikzpicture tabular* center enumeratelabelarabic* itemseppt tabularxtextwidthXXX item y' sinx & item y' fracyx & item y' x + y item y' -y & item y' cosy & item y' x tabularx enumerate textitHinweis: Gib deine Antwort in der Form BuchstabZahl an. Es sind keine Begründungen erforderlich. %b abc Bestimme die Partikulärlösung des folgen Anfangswertproblems durch Separation der Variablen: y' frac+y^x quad textmit quad y abc Bestimme die allgemeine Lösung der folgen inhomogenen linearen Differentialgleichung zweiter Ordnung mit konstanten Koeffizienten: y'' + y' - y cosx abcliste
Solution:
abcliste abc A- B- C- D-. hfill . Pkt./richtige Antwort abc Separation: frac+y^ dy fracx dx implies arctany ln|x| + C. Anfangswert y : arctan ln + C implies + C implies C . Lösung: yx tanln|x|. abc . Homogene Lösung y'' + y' - y : Charakteristische Gleichung: lambda^ + lambda - implies lambda+lambda- . hfill. Pkt Eigenwerte: lambda_ - lambda_ . hfill. Pkt Allgemeine homogene Lösung: y_hx C_ e^-x + C_ e^x. hfill. Pkt . Partikuläre Lösung y_p: Ansatz: y_px Acosx + Bsinx. hfill. Pkt Ableitungen bilden: y_p'x -Asinx + Bcosx y_p''x -Acosx - Bsinx. hfill. Pkt Einsetzen in die Differentialgleichung und Sortieren: -A + B - Acosx + -B - A - Bsinx cosx -A + Bcosx + -A - Bsinx cosx. hfill. Pkt Koeffizientenvergleich und Lösen des Gleichungssystems: I -A + B II -A - B implies A -B Einsetzen von II in I: B + B implies B und A -. Somit: y_px -cosx + sinx. hfill. Pkt . Allgemeine Lösung y y_h + y_p: yx C_ e^-x + C_ e^x - cosx + sinx. hfill. Pkt abcliste
Contained in these collections
| Title | Creator | Matched on |
|---|---|---|
| Differentialgleichungen | uz | title |
| Differentialgleichungen | uz | title |
| Differentialgleichungen | pw | title |
| Differentialgleichungen | uz | title |
| Einfacher Transformator | uz | tags |

