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Math Help - evaluating an integral

  1. #1
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    evaluating an integral

    I'm trying to evaluate evaluating an integral-image.png

    and I keep getting

    evaluating an integral-image-3.png. Paul's Notes says the correct answer is (11/36)e^12 + (7/36)e^(-6) but I can't seem to get that answer.

    I keep getting evaluating an integral-image2.png which simplifies to the same answer above.

    Can anyone tell me where I'm going wrong? thanks much
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  2. #2
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    Re: evaluating an integral

    evaluating an integral-wolframalpha-_xe__6x_dx__from__1_to_2__definite_integral__2014_05_10_1410.gifevaluating an integral-wolframalpha-_xe__6x_dx__from__1_to_2__indefinite_integral__2014_05_10_1409.gif
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  3. #3
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    Re: evaluating an integral

    thanks I was missing an x!
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