Question 4 (25 marks) (a) Use the definition of derivative to find f'(x), where f(x) = sin(3x). (10 marks) (b) Find the equation of the tangent line to the graph y=x* +4x – 3 at x =1. (7 marks) dy (c) Given y=u", u=cos 2v and v= Rxe", find in terms of x. dx (8 marks)
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