Find the directional derivative of f at P in the direction of a. f (x, y, z) = xy + 2²; P(0,-4, –5); a =i+j+k NOTE: Enter the exact answer. Duf %3D

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Q: if S f(X) dx = 36 and 9(x) dx=13 find So [4f(x) +69(x)] dx %3D

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