Check all of the equations below that are exact differential equations. y + 2yx y = 0 2xy + 2xy? y = 0 O e-* sin(y) e- cos(y)y = 0 - e

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ISBN:9780470458365
Author:Erwin Kreyszig
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Check all of the equations below that are exact differential equations.
y + 2yx y = 0
2xy + 2xy? y = 0
Ое sin(y) — е "
cos(y)y/ = 0
e
- e
(2xy + y+ 1) dx + (x + x² + y² ) dy = 0
(x2 + y) dx + (x + y?) dy = 0
Transcribed Image Text:Check all of the equations below that are exact differential equations. y + 2yx y = 0 2xy + 2xy? y = 0 Ое sin(y) — е " cos(y)y/ = 0 e - e (2xy + y+ 1) dx + (x + x² + y² ) dy = 0 (x2 + y) dx + (x + y?) dy = 0
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