Texas Instruments TI-83 Manual Book page 102

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
solve(
value; finds the zero closest to your guess.
zero
The time spends to find the correct zero value
zero
depends on 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
graph is displayed with
corner.
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.
Right Bound?
Press | or ~ (or enter a value) to select the x-value for
the right bound, and then press Í. A
the graph screen shows the right bound.
displayed in the 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
the same x-value for other selected functions, press } or
†. To restore the free-moving cursor, press | or ~.
CALCULATE
Left Bound?
is displayed in the bottom-left corner.
format is selected. To move to
CoordOff
menu. The current
in the bottom-left
3 indicator on
is then
Guess?
4