Let f(x, y, z) = xy sin(xz). The rate of change of f at the point P(1, -2, π) in the direction of the vector v = Select one: none of these O b. (-4T - 10)/√/38 O c. (-4T + 10)/√38 O d. (-4π10)/√/2 O e. (4π-10)/√/38 a. (-2,3,-5) is:

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