HOW TO FIND THE LIMIT OF A FUNCTION WITH TI89 CALCULATOR

Option 1: Using a function typed into y1
Steps	Key Sequence	Screens
1. Input Equation into Y1 If needed, instructions for using a piecewise-defined function.
2. Quit Equation Editor	Press 2nd, then ESC (for QUIT)
3. Select Limit Function	Press F3 (for Calc menu)
	Press 3 (for 'limit(')
4. Input Function	Press y, then 1, then (x)
5. Input Independent Variable	Press 'comma' key, then x
6. Input Point of Limit	Press 'comma' key, then select appropriate number
7. Input Direction of Limit	Press 'comma' key, then Press (-), then 1 for limit from left
	Press 1 for limit from right
	Press nothing for bidirectional limit
8. Execute	Press ')', then ENTER
Option 2: Using Home Screen
Steps	Key Sequence	Screens
1. Select Limit Function	Press F3 (for Calc menu)
	Press 3 (for 'limit(')
2. Input Function
3. Input Independent Variable	Press 'comma' key, then x
4. Input Point of Limit	Press 'comma' key, then select appropriate number
5. Input Direction of Limit	See step 7 above
6. Execute	Press ')', then ENTER
Option 3: Evaluating Limits at Infinity
Steps	Key Sequence	Screens
	Follow steps 1 – 5 (Option 1) OR steps 1 – 3 (Option 2)
1. Input Point of Limit (i.e., infinity OR –infinity)	Press 'comma' key, then 'diamond' key, then CATALOG key (for infinity symbol)
2. Execute	Press ')', then ENTER