Using the TI-86 graphing calculator, give numerical evidence to evaluate

- Enter the function:
**Y = (x^2-1)/(x^2+1)**and press the ENTER key. - Press 2nd MATH and pick
**MISC**by pressing F5. - Press F3 to enter
**seq**. Continue to enter the command:**seq(10^I, I, 0, 10, 1) STO x**and press the ENTER key.

- This creates a list of
**x**-values:**{1 10 100 1000 ... 10000000000}**which are the powers,

**10**, for^{I}**I = 0, 1, ..., 10**. - Press the EXIT key twice.
- Type
**Y**and press the ENTER key. On the screen you will then see the list of corresponding**y**-values using the function you entered above. It appears that the limit is**1**. - If you want to round the numbers to fewer decimal places, press the
2nd MATH key again followed by F1 to pick
**NUM**. - Press F1 to pick
**round**and complete the command**round(2nd ANS, 4)**and press the ENTER key to round to four decimal places.

This page was constructed with the help of Chris O'Brien.