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x31x3+xdx is equal to 

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a
x−loge⁡|x|+loge⁡x2+1−tan−1⁡x+C
b
x−loge⁡|x|+12loge⁡x2+1−tan−1⁡x+C
c
x+loge⁡|x|+12loge⁡x2+1+tan−1⁡x+C
d
none of these

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detailed solution

Correct option is B

∫x3−1x3+xdx=∫1−11+x2−1x+xx2+1dx=x−tan−1⁡x−loge⁡|x|+12loge⁡x2+1+C


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