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int(0)^(2) (6x+3)/(x^(2)+4)dx...

`int_(0)^(2) (6x+3)/(x^(2)+4)dx`

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Given `I=int_0^2(6x+3)/(x^2+4)dx`
`int(6x+3)/(x^2+4)dx=3int(2x+1)/(x^2+4)dx`
`=3int(2x)/(x^2+4)dx+3int(1)/(x^2+4)dx`
`=3log(x^2+4)+3/2tan^(-1)(x/2)`
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