A basic differentiation question

Discussion in 'Math' started by jaygatsby, Mar 19, 2012.

  1. jaygatsby

    Thread Starter New Member

    Nov 23, 2011
    185
    23
    I have this function: g(x) = (x^2-2x)e^x

    I attempted to differentiate using the product rule: (x^2-2x)e^x + e^x(2x-2). I don't think that this is right. I used the differentiation function on my TI-89 calculator and the calculator thinks the derivative of g(x) is (x^2-2)e^x

    I'm likely misunderstanding some simple concept! Any suggestions?

    Thank you
     
  2. mrmount

    Active Member

    Dec 5, 2007
    59
    7
    Expand (write out the terms and simplify)the term that you calculated. The (e^x)2x term will cancel out. You will get the same result as the calculator.
     
    jaygatsby likes this.
  3. panic mode

    Senior Member

    Oct 10, 2011
    1,320
    304
    that answer is correct and same as what you got from calculator, it is just that calculator combined the terms.
     
    jaygatsby likes this.
  4. mateenyasin1

    New Member

    Mar 20, 2012
    6
    0
    calculator simplified the results! :p
     
Loading...