1. Consider u = x*+1 v = Vu -1 w = 8v-1. Find dw/dx 2.a) Determine x 1I dy -ify = V(5x2 - 3)3 [3 b) State any values of x for which the function is not differentiable. Explain3. The position of a particle moving in a straight line is given by s(!) = $ 15 - 81 + 281, where s(t) represents the W number of metres the particle is from a fixed point after t seconds. At what time(s) is the particle not moving? [3 marks]