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3. With steps pls 3. [10] Let w = xy + yz + zx, x = r cos(0), y = r sin(0), z=r0. Use the

3. With steps pls

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3. [10] Let w = xy + yz + zx, x = r cos(0), y = r sin(0), z=r0. Use the Chain Rule to find ar when r =3 and 0 ="

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