1. Use the limits definition f' ( x ) = limf(xth)-f(x) to find an expression for the derivative to the functions; h-0 h a. f(x) = 7x b. f ( x ) = S c. f(x) = -20x3 2. a. Use the limits definition f'( x = lim f(xth)-f(x) h-0 h to find an expression for the derivative to the function y = 2X3. b. Using your answer to a) find the slope of the tangent to the curve y = 3x to complete the following table. X Slope of tangent (m = y') -3 -2 -1 O N 3