z=f(x,y)
x= r3 s
y= re2s
(a) Find ∂z/∂s (write your answer in terms of r,s, ∂z/∂x , and ∂z/∂y .
(b) Find ∂2z/∂s∂r (write your answer in terms of r,s, ∂z/∂x , and ∂z/∂y , ∂2z/∂x2, ∂2z/∂x∂y , and ∂2z/∂y2).
Expert A