please solve this

Asked by www1028 | 5th Sep, 2010, 03:06: PM

Expert Answer:

I=xx4+1dx = 122xx4+1dxLet x2 = t, 2xdx = dtI = 121t2+1dt = 12tan-1t + c = 12tan-1(x2) + c">

Answered by  | 5th Sep, 2010, 05:45: PM

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