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Thread: more integration!

  1. January 21st 2010, 05:31 PM #1
    littlesohi
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    more integration!

    1. \int x^2sin2x dx

    2. \int (x+3)/(x+1)
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  2. January 21st 2010, 05:33 PM #2
    Jhevon
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    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by littlesohi View Post
    1. \int x^2sin2x dx
    Hint: integration by parts: u = x^2, ~dv = \sin 2x dx (you will have to do integration by parts twice.

    2. \int (x+3)/(x+1)
    Hint: Note that this is \int \frac {x + 1 + 2}{x + 1}~dx = \int \left( 1 + \frac 2{x + 1} \right)~dx
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