Find the derivative of f(x) = x cos.x '(x) = Problem 2. (1 point) Find the derivative of f(x) f'(x) = . Problem 3. (1 point) Let f(x) = (6x-2x)(2+x). Find f'(x). f'(x) =. Problem 4. (1 point) If f(x) = cosx-2 tan.x, then f'(x) =. 4 8x+5 Problem 5. (1 point) If f(t) (12+2t +2) (2t -2+4t-3), find f'(t). Answer: If find f'(x). Find f'(2). Problem 11. (1 point) Let f(x) = f'(x) =_ Problem 12. (1 point) Differentiate f'(x) = f(x)= 6x52x4-4x XA = 2x tan.x secx Then, f(x) =tan(x) (3 sin(x) + 4 cos(x)). Problem 16. (1 point) -1 1110 1,0 Note: You can click on the graph to obtain a larger version in a new browser window. The graphs of the function f (given in blue) and g (given in red) are plotted above. Suppose that u(x) = f(x)g(x) and v(x) = f(x)/g(x). Find each of the following: u'(1) = v (1) = .