21. Find the derivative of y with respect to x y = ln x dy dx 4)B) C) X 22. Suppose that F(x) = f(g(x)) and g(14)-2. g (14)-5. f(14)= 15, an Find F'(14). A) 60 B) 140 C) 24 D) 17 E) 20 23. If f(t)=4r +1, find f'(2) f'(2)= 4 A) -- B) 3 C)-D) E) 27 27 D) 3x E) none of these 24. Use implicit differentiation to calculate y' xy + xy = x+3y y'= A) -y-2xy 4x+x 1-y-2x 4x+x-3 D)- 1-y-2xy 4x+x-3 E) none of these B) C) 25. Use continuity to evaluate the limit. lim sin(x+6 sin x) x-8 A) B)-1 C) 1 D) 0 E) 87 xy + 2x-3 xy (4x-1)