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Let f(x,y,z)=6xy−z^2, x=6rcos(θ), y=cos^2(θ), z=7r. Use the Chain Rule to calculate the partial derivative. (Use symbolic...

Let f(x,y,z)=6xy−z^2, x=6rcos(θ), y=cos^2(θ), z=7r.

Use the Chain Rule to calculate the partial derivative.

(Use symbolic notation and fractions where needed. Express the answer in terms of independent variables

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