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Author Question: Find and if z = f(x, y) = x2y3 sin(x - 2y). (Read 25 times)

jasdeep_brar

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Question 1

Find and  if z = f(x, y) = cos (ln(x2 + xy + y2)).
=   ;   =
= - ;   = -
= - ;   = -
= - ;   = -
= - ;   = -

Question 2

Find and  if z = f(x, y) = x2y3 sin(x - 2y).
= 2xy3 sin(x - 2y) + y3 cos(x - 2y),   = 3x2y2 sin(x - 2y) - 2x2 cos(x - 2y)
= 2xy3 cos(x - 2y),   = - 6x2y2 cos(x - 2y)
= 2xy3 sin(x - 2y) - x2y3 cos(x - 2y),   = 3x2y2 sin(x - 2y) + 2x2y3 cos(x - 2y)
= 2xy3 cos(x - 2y),   =  6x2y2 cos(x - 2y)
= 2xy3 sin(x - 2y) + x2y3 cos(x - 2y),   = 3x2y2 sin(x - 2y) - 2x2y3 cos(x - 2y)


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Marked as best answer by jasdeep_brar on May 27, 2021

Carissamariew

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jasdeep_brar

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Reply 2 on: May 27, 2021
YES! Correct, THANKS for helping me on my review


marict

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Reply 3 on: Yesterday
Great answer, keep it coming :)

 

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