Find all the first and second order partial derivatives of f(x, y) = 3 sin(2x + y) — 7 cos(x — y). A. f = fx = = B. С. D. E. F. aa aa ду a² f дх2 дуг = 22f дхду a² f дудх = fy = = fxx = = = fyy = = fyx fxy = =
Find all the first and second order partial derivatives of f(x, y) = 3 sin(2x + y) — 7 cos(x — y). A. f = fx = = B. С. D. E. F. aa aa ду a² f дх2 дуг = 22f дхду a² f дудх = fy = = fxx = = = fyy = = fyx fxy = =
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:Find all the first and second order partial derivatives of f(x, y) = 3 sin(2x +y) — 7 cos(x - y).
af
А. =
?x
B.
с.
D.
E.
Е.
ala
of = fy =
=
a2f
дх2
a2f
дуг
a2f
дхду
a2f
дудх
fx
=
=
=
=
=
fxx
fyy
:fyx
: fxy
=
=
=
=
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