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Extremely difficult

  1. Dec 3, 2008 #1
    I have been looking at this problem for quite some time and have been unable to figure out how to approach it.

    the problem is in the attachment. It's from a brain teaser that my teacher gave us in class and it's so puzzling that I need to know how to do it. Any help would be EXTREMELY appreciated

    Attached Files:

  2. jcsd
  3. Dec 4, 2008 #2


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    Science Advisor

    What you have is the standard Normal probability distribution and a power series expansion for it. You want to show that the series is, in fact, an anti-derivative of the given function. To do that, differentiate the series term by term.
  4. Dec 4, 2008 #3
    How many terms should i differentiate the series too? I brought the problem to my calculus 3 teacher and she was puzzled by it as well.
  5. Apr 6, 2011 #4
    Find the series representation of the antiderivative and sum it out until you see a correspondence in the two expansions.
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