Texas Instruments TI-82 STATS Manual Book page 102

Using the CALC (Calculate) Operations
zero
3.26 Function Graphing
finds a zero (x-intercept or root) of a function using
zero
Functions can have more than one x-intercept value;
the zero closest to your guess.
The time spends to find the correct zero value depends on
zero
the accuracy of the values you specify for the left and right
bounds and the accuracy of your guess.
To find a zero of a function, follow these steps.
1. Select from the
2:zero
is displayed with
2. Press } or † to move the cursor onto the function for which
you want to find a zero.
3. Press | or ~ (or enter a value) to select the x-value for the
left bound of the interval, and then press Í. A
indicator on the graph screen shows the left bound.
is displayed in the bottom-left corner. Press | or ~
Bound?
(or enter a value) to select the x-value for the right bound,
and then press Í. A
shows the right bound.
bottom-left corner.
4. Press | or ~ (or enter a value) to select a point near the
zero of the function, between the bounds, and then press
Í.
The cursor is on the solution and the coordinates are displayed,
even if format is selected. To move to the same
CoordOff
x-value for other selected functions, press } or †. To restore
the free-moving cursor, press | or ~.
menu. The current graph
CALCULATE
in the bottom-left corner.
Left Bound?
indicator on the graph screen
3
is then displayed in the
Guess?
(continued)
solve(
finds
zero
4
Right
.