(a) tan * 2.025 - tan 2 (b) e-.02. 9. Let f(x) = $/2+3x. (a) Find the linear approximation for f (x) near x = -1. Indicate if it is an over- or under-estimate and use a grpah to illustrate your answer. (b) Let L(x) = 1.5 + 0.25x be the linear approximation of f (r) near x = 2. Use L(x) to approximate v7.91, and compute the relative error of this ap- proximation