Use the formula k(t) = r(t) × r"(t)|| ||r(t)||° to find k(t). r(t) = 7 cos(8t)i+7 sin(8t)j + tk K(t) %3D

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A: at x=-2, function is defined as:g(x)=-4;       if x=-2ANSWER 14:g(-2)=4

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A: Explanation of the answer is as follows

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A: We need to find derivative.