HOW TO FIND THE SUM OF A SERIES WITH TI89 CALCULATOR

Example 1: Find .
Steps	Key Sequence	Screens
1. Select Sum Function	Press F3 (for Calc menu)
	Press 4 (for 'sum(')
2. Input General Term for Series	Press ALPHA, then 9 (for i), then ^, then 2, then comma key
3. Input Variable of Expression	Press ALPHA, then 9 (for i), then comma key
3. Input Lower Limit of Sum	Press 1, then comma key
4. Input Upper Limit of Sum	Press ALPHA, then 6 (for n), then )
5. Evaluate Sum	Press ENTER
Example 2: Find .
Steps	Key Sequence	Screens
1. Select Sum Function	Press F3 (for Calc menu)
	Press 4 (for 'sum(')
2. Input General Term for Series	Press ALPHA, then multiplication key (for j), then ^, then 2, then comma key
3. Input Variable of Expression	Press ALPHA, then multiplication key (for j), then comma key
3. Input Lower Limit of Sum	Press ALPHA, then 6 (for n), then comma key
4. Input Upper Limit of Sum	Press ALPHA, then 6 (for n), then +3)
5. Evaluate Sum	Press ENTER