Question 8 If f'(x) = e* then f(x) = ? Question 9 If f'(x) = sin(x) then f(x) = ? a) sin x b) COS X C) - COS X d) - sin x e) tan x Question 10 If f ( x) = 1 ex then f'(x) =? a) 1 b) - 1 c) =In(ex) d) -ex