Maths! Second Differential

Discussion in 'Homework Help' started by Nishki, May 17, 2009.

  1. Nishki

    Thread Starter Member

    May 30, 2008
    11
    0
    Hello all,

    I am stuck with this problem; I have to find the second differential (d2 y/dx2) of 7x3 e2x

    I have differentiated this to 7x3 2e2x + e2x 21x2, but is there a simpler way of writing this in order to find the next differential?

    Or is it possible to differentiate the 7x3 2e2x then do the same with the e2x 21x2 and add the results together at the end?

    Thanks in advanced.
     
  2. studiot

    AAC Fanatic!

    Nov 9, 2007
    5,005
    513
    7x3 2e2x + e2x 21x2 = e^2x(21x^2 + 14x^3)

    Which is a straightforward product to differentiate.
     
  3. Nishki

    Thread Starter Member

    May 30, 2008
    11
    0
    Okay, thanks for the help!
     
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