How To Find Zeros On A Graphing Calculator Ti-84 Plus

Finding zeros on a graphing calculator like the TI-84 Plus is a crucial skill in mathematics, particularly in algebra and calculus. Zeros help us understand the behavior of functions and solve equations…

1. Enter the function for which you want to find zeros in the ‘Function’ input field.
2. Choose an interval from the ‘Interval’ dropdown menu.
3. Click the ‘Calculate’ button.

The calculator uses the bisection method to find zeros. Given a function f(x) and an interval [a, b], the method finds a zero in the interval by repeatedly evaluating the function at the midpoint of the interval…

Let’s consider three examples: x² – 4, x³ – 6x, and sin(x) – x.

Function	Interval	Zeros
x^2 – 4	[-10, 10]	[-2, 2]

Function	Interval	Number of Zeros
x^2 – 4	[-10, 10]	2

• Always choose an interval that you expect to contain the zeros.
• For complex functions, you might need to use a smaller interval or a different method.

What is a zero of a function?

A zero of a function is a value that makes the function equal to zero.

For more information, see the TI-84 Plus guide on finding zeros.