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Full Version: Guesses for TI, Sharp, Casio Solvers
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Using HP-34 and 15 as the baseline:

These use a pair of guesses to use the SOLVE function. So, when the TI-36X Pro, Sharp EL-W516X (and T), as well as Casio 991 and 115 series,
how are they determining a second boundary for guesses in their solve function?
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