6. Find out the points where the tangents of the following functions are horizontal. (C [2 A /4 T [4) A. f(x) = \\/x3 - 3x + 2 B. y = (3x - 6)2(x2 7x + 10)2 7. Assess the differentiability of the following function. State value(s) of x where it is NOT differentiable, and state why. (C /4 A /2 T /2) (x22x +1) _ 2_ 2 f(x) (x 2x) H1 5. Find the derivatives of the following functions. Do NOT simplify. (K /4A /4T /2) x3 +4 A. f(x) = (x2 - 3x +3x- 1) 3x - 2 B. y + (x2 - 1)(2x + 3)