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Math Help - Initial Value Problem/Separable Equation

  1. #1
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    Initial Value Problem/Separable Equation

    So in this problem we are given that
    (xlnx)y' + y = x^2 * e^x
    and
    y(e) = 1

    I under stand how it needs to be solved (need to get all y on one side, all x on other side, then integrate, then solve for y, then sub in y(e) = 1 to determine value of C.
    I can only get this far, however:
    dy/dx = (x^2 * e^x)/xlnx + y/xlnx

    I could factor out the 1/xlnx, but it wouldn't be separable. I could do some minor simplifying, but then it wouldn't be factorable.

    Any help is greatly appreciated
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  2. #2
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    Re: Initial Value Problem/Separable Equation

    Robert

    The D.E you mentioned is not separable ....it has the type dy/dx+a(x)y=b(x)
    where a(x) and b(x) are functions of x. This type of D.E is linear D.E first order...and cannot be solved by separating the variables...

    consult your book about the linear D.E of first order and see how you can solve it ....IT IS EASY.

    MINOAS
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  3. #3
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    Re: Initial Value Problem/Separable Equation

    My Lord! I remember that now.
    How silly of me ahahaha thanks a lot!
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