The first limit should contain the expression for the definition of tangent-line slope; the second limit should contain the simplified expression; the third is the value for m. a) lim_(x→a) [f(x) - f(a)] / (x - a) b) lim_(x→a) f'(x) c) lim_(x→a) [f(x) - f(a)] / (x - a) = m d) lim_(x→a) [f'(x)] = m