8. Find the point, (x, y), on the function y=3x -7x+1 where the tangent to the parabola is parallel to the line 8x-2y+1=0 [3] 9. Given the function /(x) =(--4+3 (2x-1) , expand f(x) and then find the equation of the tangent line at x =1 making use of the expanded form of f(x). [2] 10. THE CHAIN RULE: DO YOU HAVE YOUR BLACK BOX 2 To find the derivative of the following function. y =(2x+1) sin(2.x) a) Which derivative rule would be necessary other than the chain rule? [1] b) How many applications of the chain rule would be necessary? [1]