5.) Find the equation of the tangent line to the graph of f(x) = x cos(x) at x=0 6.3 / Compute the derivative of f(x) = x+ 2x at x=3 7.) Determine the derivative of f(x) = 2 x 3/2+x 3/3 B. use the formula for f'(x) to determine f'(a) C. Find the equation of the line tangent to the graph of fat x=9 C./