Find the derivative of the function at Po in the direction of A. f(x,y,z) = xy + yz + zx, Po(3, - 3, – 1), A= 2i + 3j – 6k (PAf) (3, - 3, - 1) =| (3, – 3, – 1) = (Simplify your answer.)

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A: We can find the equation of sphere as below.

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A: To find the sum of the series.

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A: Here is the answer given below

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A: Topic:- integration

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A: Use limit concept

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A: answer is in next step

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A: Let's find.

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A: