3.26 Function Graphing
82533F~1.DOC TI-83 international English Bob Fedorisko Revised: 10/26/05 1:20 PM Printed: 10/27/05 1:55
PM Page 26 of 28
82533F~1.DOC TI-83 international English Bob Fedorisko Revised: 10/26/05 1:20 PM Printed: 10/27/05 1:55
PM Page 26 of 28
zero finds a zero (x-intercept or root) of a function using solve(.
Functions can have more than one x-intercept value;
zero finds
the zero closest to your guess.
The time
zero spends to find the correct zero value 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
2:zero from the CALCULATE menu. The current graph
is displayed with
Left Bound? in the bottom-left 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
4
indicator on the graph screen shows the left bound. Right
Bound?
is displayed in the bottom-left corner. Press | or ~
(or enter a value) to select the x-value for the right bound,
and then press Í. A
3 indicator on the graph screen
shows the right bound.
Guess? is then 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
CoordOff format is selected. To move to the same
x-value for other selected functions, press } or †. To restore
the free-moving cursor, press | or ~.
Using the CALC (Calculate) Operations (continued)
zero
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