Texas Instruments TI-89 User Manual - Page 675
Graphing the Solution, accuracy. The smaller the value
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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. leftNrt shows the difference, which indicates the solution's accuracy. The smaller the value, the more accurate the solution. If the solution is precise, leftNrt=0. If you: Want to solve for other values Want to find a different solution for an equation with multiple solutions See the message: Do this: Edit the equation or variable values. Enter an initial guess and/or a new set of bounds close to the other solution. Press N. The unknown variable shows the value being tested when the error occurred. • The leftNrt value may be small enough for you to accept the result. • If not, enter a different set of bounds. 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 Numeric Solver 675
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