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Meaning Use this mode to draw graphs of implicit functions.
Use this mode to solve linear equations with two through six unknowns, quadratic equations, and cubic equations.
Use this mode to store programs in the program area and to run programs.
Use this mode to transfer memory contents or back-up data to another unit.
Use this mode to adjust the contrast of the display.
Use this mode to check how much memory is used and remaining, to delete data from memory, and to initialize (reset) the calculator.
Power Supply
This unit is powered by four AAA-size (LR03 (AM4) or R03 (UM-4)) batteries. In addition, it uses a single CR2032 lithium battery as a back up power supply for the memory. If the following message appears on the display, immediately stop using the calculator and replace batteries.
If you try to continue using the calculator, it will automatically switch power off, in order to protect memory contents. You will not be able to switch power back on until you replace batteries. Be sure to replace the main batteries at least once every two years, no matter how much you use the calculator during that time. Warning! If you remove both the main power supply and the memory back up batteries at the same time, all memory contents will be erased. If you do remove both batteries, correctly reload them and then perfotm the reset operation.
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