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1 151 WebCalc Fall 2002-copyright Joe Kahlig Quiz #7 MATH 151 Section Name: September 26, 2002 1. Find the derivatives of these functions. You do not have to simplify. (a) y = (x3 − x)(x2 + 7)10 (b) y = x4 + 3 x3 − x 2. Find the equation of the tangent line at x = 0 for y = √ x+4 3. Find all values of x, if any, where the function f (x) = (x2 + 3)(x + 8) has an instantaneous rate of change of 3.