Please answer question #66, #70 with steps and explanation to solutions
In Problems 61 and 62, (a) find all x-values where the E l slope of the tangent equals zero, (b) find points (x,y) where the slope of the tangent equals zero, and (c) use a graphing utility to graph the function and label the points found in part (b). 61. f(x) = x3-3x2 + 1 62,f(x)-x"-6x4 + 8 63. Iff(x) = (3x-1)(x2-4x), find f'(x). 64. Find y, ify=(x" + 3)(3x3 + 1). 5q dp 65. If p=2a3+1, find d 66. Find'. ifs = 67. Find for y=Vs (3x+2) 68. Findfor 2x+ 69. ds dt (3t 1) dy dx dC x3 + 1 Ify = (x3-4x2), find y'. Ify = (5x6 + 6x4 + 5)6, find y". 71. Ify= (2x4-9)", find- 70. dy dx
