Question about Texas Instruments TI-89 Calculator

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TI 89: unnecessary Overflow

I am a mathematics instructor helping a student with a calculator problem. The calculator reports an overflow message for values it should be able to calculate. I know the calculator reports this message when the value of the number has more digits than is allowed for the given mode.

I am calculating an easy compound interest problem in one-step:

1000(1+.08/365)^(365*3)

I use my older TI-83 and get the approximate answer 1271.21. I know this calculator should be able to evaluate this expression. Is this a fixable hardware problem or has TI announced anything lately about a repair? This is a brand new calculator and I have reset all of the original settings.
Thanks.

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Mine said 1271.216 What hardware you have?
raklein62@yahoo.com

Posted on Aug 26, 2009

  • Richard Klein
    Richard Klein Aug 27, 2009

    Trying to assimulate your problem, I did find the overflow but only in the exact mode. This is very correct! Auto mode gives 1271.22 because of the turnicate.

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