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Calculators TI-89 making negative e

  1. Jan 29, 2011 #1
    can anyone help me to get this quotation "e^(-x)" on ti-89 ?
    after i putting "-" before "x" and pressing enter , the error syntax happens ... :confused:
     
    Last edited: Jan 29, 2011
  2. jcsd
  3. Jan 29, 2011 #2

    Borek

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    Staff: Mentor

    Have you tried to read manual? It says to not use "-" but (-) (button between dot and enter).
     
  4. Jan 29, 2011 #3
    ah tanx alot i was searching for it all day long !!! :wink:
     
  5. Jan 29, 2011 #4
    Did you not notice there are two minus signs? :tongue: Just kidding. It's okay, we've all done it.
     
  6. Jan 29, 2011 #5
    Yeah The 1st minus was the tricky one ! :biggrin:
     
  7. Jan 31, 2011 #6

    Mark44

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    Insights Author

    Staff: Mentor

    I don't have a TI-89, but my guess is that one of the - keys is for subtraction, and the other is to change the sign of the operand.
     
  8. Jan 31, 2011 #7
    yeah exactly :wink:
     
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