1 (a) Find the point that is a distance 0.1 from the point P = (3,5) in the direction of v = (3,-1). Give five decimal places in your answer. Q=( (b) Use P and Q to approximate the directional derivative of f(x, y) = √√√x+3y at P, in the direction of v. (c) Give the exact value for the directional derivative you estimated in part (b). f₁ =

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