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QUESTION
( 1 point ) Let 2 * + Sy .
Assume z
z is a smooth function of x
x and y
y. If z
xy
=−6x
zxy=−6x, what can you say about each of the following?
( 1 point ) Let 2* + Sy . ThenThe rate of change in 2 at ( 1 1 ) as we change I but hold y fixed isandThe rate of change in 2 at ( 1 , 1 ) as we change y but hold * fixed is