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Finding inflection points

  1. Nov 23, 2008 #1
    1. The problem statement, all variables and given/known data
    find the inflection points of the curve y=(^3 +6x^2 +15x +19)e^-x correct to five decimal places

    2. Relevant equations

    3. The attempt at a solution
    i know how to find the inflection points. you graph the derivative and find where the concavity shifts. but the e^-x really throws me off
  2. jcsd
  3. Nov 23, 2008 #2
    1)take 2 derivatives
    2)set result equal to zero
    3)solutions are inflection points
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