Question: Let f ( x , y , z ) = x 2 s i n y + y e z , where x = t

Let f(x,y,z)=x2siny+yez, where x=t+3,y=et-1 and z=ln2t. Using the chain rule, dfdt at t=1 is:
None of them
-12
1+2
0
Let f ( x , y , z ) = x 2 s i n y + y e z , where

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