Consider M(x, y) + N(x, y) = 0. (a) Suppose we can find a function F = F(x, y) so that Fr F(x, y) so that F = M and Fy = N. Give an example of such an equation and solve it.

Advanced Engineering Mathematics
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Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Consider M(x, y) + N(x, y) = 0.
dx
=
M and Fy
= N. Give an
(a) Suppose we can find a function F = F(x, y) so that F
example of such an equation and solve it.
(b) Suppose we can find functions and z so that (u oz)(x, y) is an integrating factor that
transforms the given equation into an exact equation. What must be true about M and
N?
Transcribed Image Text:Consider M(x, y) + N(x, y) = 0. dx = M and Fy = N. Give an (a) Suppose we can find a function F = F(x, y) so that F example of such an equation and solve it. (b) Suppose we can find functions and z so that (u oz)(x, y) is an integrating factor that transforms the given equation into an exact equation. What must be true about M and N?
(c) Continuing from part (b), suppose we can find functions μ and z so that (uoz) (x, y) is an
integrating factor that transforms the given equation into an exact equation. Construct
a differential equation with respect to u to solve for μ.
(d) Using the ODE with respect to u in part (c), given (zo) =o, when does a unique
solution exist?
(e) Suppose z = x² + y³. Find u from part (c), if possible.
(f) Construct an example of an equation that can be solved using the integrating factor in
part (e) and then solve this equation.
Transcribed Image Text:(c) Continuing from part (b), suppose we can find functions μ and z so that (uoz) (x, y) is an integrating factor that transforms the given equation into an exact equation. Construct a differential equation with respect to u to solve for μ. (d) Using the ODE with respect to u in part (c), given (zo) =o, when does a unique solution exist? (e) Suppose z = x² + y³. Find u from part (c), if possible. (f) Construct an example of an equation that can be solved using the integrating factor in part (e) and then solve this equation.
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