8. Show that f(x) is continuous at x =0 XSO ( ( ) = X X 70 9. Find the horizontal and vertical asymptotes of the following function: 3x+ 1 2 x - 1 10.(a) Find the derivative of the function f(x) = x3 using the definition of derivative. (b) What is f'(-3)? (c) What is the equation of the line tangent to f(x) = x2 at the point (-3,9) ? 10. Find the derivative of each of the following functions: f(x) = 3x5 -2x +5 f(x) = ex (x*+2x) f(x) = x/ex