Hank Cardwell
Hank Cardwell
EDLF 345
9.17.01
A Neat Trick With Your TI-83: Utilizing Your Solver
One of the features added in the upgrade from TI-82 to TI-83 was the addition of a single-variable equation solver. This feature can find the answer to almost any single-variable mathematical problem. It’s only shortcoming is that it displays an error message if the solution is a non-real or imaginary number. For example, it cannot solve the equation: (x^2 + 1) = 0. For all other equations, though, it provides a numerical answer.
1. Turn your calculator ON.
2. Press the MATH button.
3. Arrow down to option “0:Solver…” Press ENTER.
4. Arrow up once to the EQUATION SOLVER. Here, enter your equation. (Note: The equation must be solved for zero.) Press ENTER.
5. At the “X = “ prompt, enter in a guess for the correct answer. This is especially important for equations that have more than one answer (For example,
with exponential equations, where there can be a positive and a negative answer).
6. Now press the ALPHA key and then press SOLVE (the same as the ENTER key). A black dot will appear beside the “X = “ followed by the solution for your problem.
This function is especially useful when the solution is not a whole-number integer easily determined through simple logic. It is important for students to realize that the problems they face beyond the classroom will not necessarily have simple or easily-determined answers. This tool arms them for those situations.
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