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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 approximations
by pressing DIAMOND, then ENTER.