Education Technology

# Knowledge Base

## Solution 11582: Finding the Zero of a Function Using the TI-83 Family, TI-84 Plus Family and TI-Nspire™ Handheld in TI-84 Plus Mode.

### How do I find the zero of a function using a TI-83 family, TI-84 Plus family and TI-Nspire handheld in TI-84 Plus mode?

To find the zero of a function using the TI-83 family, TI-84 Plus family and TI-Nspire handheld in TI-84 Plus mode, the zero command will need to be used. Please refer to the following example.

Example: Find the zero of the function: y = 2X + 4

Solution:

1) Press [Y=].
2) Enter the function.
3) Press [GRAPH].

4) Press [2nd] [CALC] [2].
5) When prompted for "Left Bound?", specify the left bound for x using the arrow keys or enter a value and press [ENTER].
6) When prompted for "Right Bound?", specify the right bound for x using the arrow keys or enter a value and press [ENTER].
7) When prompted for "Guess?", move the cursor close to the zero value or enter a value and press [ENTER].

The screen will show the zero, which is (-2, 0).

Please see the TI-83 family and TI-84 Plus family guidebooks for additional information.

Please Note: Users in TI-Nspire TI-84 Plus mode may reference the TI-84 Plus family guidebook.