Texas Instruments TI-89 User Manual

Numeric Solver

675

Note:

To stop (break) a calculation, press

´. The unknown variable shows the value

being tested when the break occurred.

Using the solution and your entered values, the left and right sides of the equation are
evaluated separately.

left

shows the difference, which indicates the solution’s

accuracy. The smaller the value, the more accurate the solution. If the solution is
precise,

left

rt=0

Note:

An iterative process is used to solve an equation. If the iterative process cannot

converge on a solution, this error occurs.

Graphing the Solution

You can graph an equation’s solutions any time after defining the known variables, either
before or after you solve for the unknown variable. By graphing the solutions, you can

If you:

Do this:

Want to solve for other
values

Edit the equation or variable values.

Want to find a different
solution for an equation
with multiple solutions

Enter an initial guess and/or a new set of
bounds close to the other solution.

See the message:

Press

. The unknown variable shows the

value being tested when the error occurred.

•

The

left

value may be small enough for

you to accept the result.

•

If not, enter a different set of bounds.