0 You must show step by step working out and do not forget to write which rule you are using. 1. (a) Differentiate y : 65mm\") cos(2x). (3 marks) (1)) For 9(90) : 3:75210ge ($2 + 1), nd g/(Jc). (3 marks) 2. Consider the function, The function f(x) : 2x3 + (1902 bx + 3 has a factor (:0 + 3). When f (as) is divide by (a: 2)7 the remainder is 15. (a) Show that a : 3 and b : 8. (3 marks) (b) Find the other two factors of f (ac) (3 marks) (0) Find axes intercepts for f (:6) (2 marks) (d) Use calculus to nd xcoordinates of turning point for f (90) (3 marks) Use x/ = 7.55 (e) Sketch the graph of y : f(m)