Knowledge Base

Solution 25050: Calculating Integrals Using the TI-Nspire™ Family.

How do I calculate indefinite and definite (numerical) integrals using the TI-Nspire family?

To calculate definite (numerical) integrals using the TI-Nspire family, please follow the examples listed below.

Example: Calculate the definite (numerical) integral of x^3+x in the interval [1,3].

1) Press [home] [A] or choose to add a Calculator application.

2) Press [menu] [4] [2] on the TI-Nspire or [menu] [4] [3] on the TI-Nspire CAS.

3) Press [1] [tab] [3] [tab].
4) Press [X] [^] [3] [tab] [+] [X].
5) Press [tab] [X] [enter].

Please Note: The TI-Nspire CAS family may also calculate indefinite integrals as it incorporates CAS (Computer Algebra System). To calculate indefinite integrals use the example below.

Example: Calculate the indefinite integral of x^3+x.

1) Press [menu] [4] [3].
2) Press [tab] [tab].
3) Press [X] [^] [3] [tab] [+] [X].
4) Press [tab] [X] [enter].

Please see the TI-Nspire family guidebooks for additional information.