Multiple Choice. Circle the MOST correct answer by circling the corresponding letter. [4 marks] 1. Determine f' (27) for f( x) =3x3. 2. What is the value of k for which f (2)=20 if f x = 4x -+kx-171 a. 11 b. 12 a. 4 C. 7 . b. 15 d. 8 C. -47 d. 8 3. For what value(s) of x do the tangents to 4. Determine the slope of the tangent to f x)=3x +1 and g x)=x +4x have the same fx=1-5x+5x' when x=1. slope? a. -10 a. X=1 b. 15 b. x=-1 C. 1 C. X=4 d. 10 d. x=-2 Write fully simplified form. [5 marks]