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stottrupbailey Group Title

integrate 6x/(2x+1)

  • one year ago
  • one year ago

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  1. stottrupbailey Group Title
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    \[\int\limits_{}^{}\frac{ 6x }{ 2x+1 }dx\]

    • one year ago
  2. ZeHanz Group Title
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    Try to rewrite the fraction: in the denominator, there is 2x+1. If you had that in the numerator as well, things would become easier. So, if it was: (6x+3)/(2x+1), this would be 3(2x+1)/(2x+1)=3. We cannot make it that simple, but we can go in the same direction:\[\int\limits_{}^{}\frac{ 6x }{ 2x+1 }dx=\int\limits_{}^{}\frac{ 6x+3-3 }{ 2x+1 }dx=\int\limits_{}^{}\frac{ 3(2x+1)-3 }{ 2x+1 }dx\]Now we can split it up:\[=\int\limits_{}^{}3dx-\int\limits_{}^{}\frac{ 3 }{ 2x+1 }dx\]Maybe you can try this yourself...

    • one year ago
  3. stottrupbailey Group Title
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    ah, I see... never would've gotten that lol thanks so much! :)

    • one year ago
  4. ZeHanz Group Title
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    yw!

    • one year ago
  5. ZeHanz Group Title
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    BTW, although you said you'd never think of this yourself, next time you will!

    • one year ago
  6. stottrupbailey Group Title
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    haha thanks :)

    • one year ago
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