Date: Tue, 20 Jul 1999 07:51:48 -0600 (CST)
Since the tangent lines at x=1 and x=3 are parallel to the x-axis the derivative of the function is zero at x=1 and x=3. If
Since f'(1) = 0 and f'(3) = 0, substituting x=1 and x=3 into f'(x) gives two equations in the variables p, q and r. (It is important here to remember tha ex is not zero regardless of the value of x.)
The final condition you have is that f(0) = 9 which gives a third equation in the variables p, q and r. Now you should be able to solve for these variables.
To return to the previous page use your browser's back button.