Numerical Integration

Press to access the numerical integration option which approximates the definite integral of an expression with respect to a variable from a start value to an end value.

Next, enter an expression, the variable, a start value, and an end value separated by commas. For example, to find the antiderivative of x3 evaluated from x = 1 to x = 2, enter

3 1 2

Note: The value of tolerance, tol is used to determine how accurate to calculate the integral. The TI tries to keep the absolute error under tol. A smaller value yields a more accurate integral but takes longer to compute. It can be changed in the tolerance editor available by pressing , typically about 0.001.

For more specific information and tips see Integration on the TI-how does it work?.