Answer question 16

t= 1.6 + 0. 2635 Jub - S sec rate, hits 16. Determine the value(s) of x for which the tangent to the curve y = (x- 3)(x"+ 3) is horizontal. [3] 17. Determine the point(s) (a, fa)) for which f'(a) - a, given that f(x) = 131