Answer questions 4-6

: Let f be the function defined by f (x) = N' = 6x 4 9% # 4 1910 s x 6 3, Which of the following statements is true? a. / is decreasing on the interval (0,1) because f'(x) 0. On what open interval is f decreasing? a. 0 d. There is no such interval 6. Let f be a function with first derivative given by f'(x) = x(x - 5)"(x + 1). At what values of x does f have a relative minimum? a. -1 only b. 0 only c. -1 and 5 only d. -1, 0 and 5 only