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HOW TO USE THE FUNDAMENTAL THEOREM OF CALCULUS PART 1 (FTC1) ON THE TI89 CALCULATOR

Steps Key Sequence Screens
Here's the general idea: Use the differentiate function (i.e., 'd(' function). You will differentiate with respect to x but the function will be a definite integral (i.e., the integrate function). The integrate function will have the following arguments: the integrand function in terms of t, the independent variable t, the lower limit, then the upper limit.
Example 1: Find the derivative of
.
Follow the example shown in the picture to the right.
  Press ENTER
Example 2: Find the derivative of
.
Follow the example shown in the picture to the right.
  Press ENTER