Question 4. (15 pts) Let $y_1(x) = \sin x$ and $y_2(x) = x^2$. (a) Find the Wronskian $W[y_1, y_2]$. (b) Determine whether $y_1$ and $y_2$ are linearly dependent. Justify your answer. (c) Can $y_1$ and $y_2$ be solutions of the same differential equation in the form of $y'' + p(x)y' + q(x)y = 0$ (where $p(x)$ and $q(x)$ are continuous functions)? Why or why not?
Added by Elizabeth P.
Close
Step 1
The Wronskian of two functions y1 and y2 is defined as the determinant of the matrix: W[y1, y2] = | y1 y2 | | y1' y2' | where y1' and y2' are the derivatives of y1 and y2 with respect to x. In this case, y1 = sin(x) and y2 = x^2. Taking the Show more…
Show all steps
Your feedback will help us improve your experience
Madhur L and 92 other Calculus 3 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Two linearly independent solutions of the differential equation y" - 4y' + Sy = 0 are:
Madhur L.
In each case, does the given set of functions form a fundamental set of solutions to the given linear homogeneous differential equation? Why or why not? Justify your answer using direct evaluation of the solutions and the Wronskian. a) {sin(2x), cos(2x)} for y" + 4y = 0 b) {cosh(2x), sinh(2x)} for y" - 2y = 0 c) {e^-3x, 4e^-3x} for y" + 6y' + 9y = 0
Adi S.
Calculate the Wronskian of y1 = 4x and y2 = 6x. W(x) = b) Are the functions y1 = 4x, y2 = 6x linearly independent or dependent? Independent Dependent c) If the functions are linearly dependent, there exists coefficients c1 and c2 such that c1y1 + c2y2 = 0 Which of the following would satisfy this? The functions are linearly independent. c1=4 and c2=6 c1=6 and c2=4 c1=-6 and c2=4
Avinash V.
Recommended Textbooks
Calculus: Early Transcendentals
Thomas Calculus
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD