need help with these questions

3. For each function, find the derivative using the LIMIT definition and evaluate at x = 2: a. f(x) = x3 - 2x b. g (x) = - 1 x + 2 c. h(x) = V3 -5x 4. Find the derivative of each function using the appropriate rule: a. y = (x2 +x3) 4 b. f (x) = Vx cos Vxc. g(x) = t4-1 14 + 1 d. y = In(cos x) - = cos2 x e. sin(xy) = x2 - y 5. Find the equation of the tangent to the curve for each function at the given point: a. y = 4 sin2 x (", 1) b. x2 + 4xy + 2 = 13 (2,1)