HOW TO FIND THE FIRST *N* PARITAL SUMS OF A SERIES WITH TI89
CALCULATOR

Example 1: Find the first 5 partial sums of the sequence . | ||

NOTE 1: The first 5 partial sums correspond to . | ||

NOTE 2: You will need to nest the series in the first argument of the sequence . Note the use of a different 'dummy' variable, k in the sequence AND
that k appears as the upper limit of the series. | ||

Steps |
Key Sequence |
Screens |

1. Input the series nested in the sequence | ||

2. Evaluate Partial Sums | Press ENTER | |

3. Find 'Hidden' Terms of Sequence | Press up arrow | |

Press right arrow (as needed) | ||

NOTE: You can find decimal approximationsby pressing DIAMOND, then ENTER. |
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