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Question

(2x1)1+xx2dx

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Solution

We have,
I=(2x1)1+xx2dx

Let
t=1+xx2
dtdx=0+12x
dt=(2x1)dx

Therefore,
I=tdt

I=t3/23/2+C

On putting the value of t, we get
I=23(1+xx2)32+C

Hence, this is the answer.

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