Question: Find d z d t where z ( x , y ) = x 2 - y 2 , with x ( t ) =

Find dzdt where z(x,y)=x2-y2, with x(t)=7sin(t) and y(t)=2cos(t).
dzdt=
Find d z d t where z ( x , y ) = x 2 - y 2 , with

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