8x2 Consider the indefinite integral dx. (Remember to use absolute values where appropriate.) 14x - 6 (a) The most appropriate substitution is u = 14x - 6 (b) After making the substitution, we obtain the integral 42 * ) du. (c) Solving this integral (in terms of u) yields X + C. 8x2 4 (d) Substituting for u we obtain the answer dx = 21 In (7x 3 - 3 ) + C x + C. 14x3 - 6