Let f(x, y) = cos(xev*) + cos(x + ey²) , find дхду* O a. -2ye" (sin(xe") – x cos(xev*) + cos(x + e»*)) O b. 2ye (sin(xe*)+xe»* cos(xev*)+ cos(x + e»*)) 2yev* (sin(xe»*) – x cos(xev*) + cos(x + ev*)) O d. -2yey* (sin(xev*) + xe»* cos(xe»*) + cos(x + e»*))

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Let f(x,y) = cos(xev²)+ cos(x + ev²) , find
дхду"
-2yey* (sin(xev") – x cos(xev*)+ cos(x + e"))
Ob.
2ye (sin(xe»²)+ xe»² cos(xe*)+ cos(x + ev*))
Oc.
2ye" (sin(xe»*) – x cos(xe»*) + cos(x + e*))
Od.
-2yev (sin(xe") + xe»* cos(xe»*) + cos(x + ev*))
Transcribed Image Text:Let f(x,y) = cos(xev²)+ cos(x + ev²) , find дхду" -2yey* (sin(xev") – x cos(xev*)+ cos(x + e")) Ob. 2ye (sin(xe»²)+ xe»² cos(xe*)+ cos(x + ev*)) Oc. 2ye" (sin(xe»*) – x cos(xe»*) + cos(x + e*)) Od. -2yev (sin(xe") + xe»* cos(xe»*) + cos(x + ev*))
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