Question: Find w/r and w/t (a) By using the appropriate Chain Rule and (b) By converting w to a function of r and t before differentiating.

Find ∂w/∂r and ∂w/∂t 

(a) By using the appropriate Chain Rule and

(b) By converting w to a function of r and t before differentiating.

w = x² + y² + z², x = r cost, y = r sint, z = t

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