# Find ∂w/∂u?

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Let

w = x^2 + y^2 + z^2,

x = uv, y = u cos(v), z = u sin(v).

Use the chain rule to find ∂w/∂u when (u, v) = (9, 0).

Let

w = x^2 + y^2 + z^2,

x = uv, y = u cos(v), z = u sin(v).

Use the chain rule to find ∂w/∂u when (u, v) = (9, 0).

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Feb 19, 2018

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