TI-89 making negative e

  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. Borek

    Staff: Mentor

    Have you tried to read manual? It says to not use "-" but (-) (button between dot and enter).
  4. ah tanx alot i was searching for it all day long !!! :wink:
  5. Did you not notice there are two minus signs? :tongue: Just kidding. It's okay, we've all done it.
  6. Yeah The 1st minus was the tricky one ! :biggrin:
  7. Mark44

    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. yeah exactly :wink:
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