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解:
令t=x^(1/6),则x=t^6,dx=6t^5dt
则原式=∫6t^5/(1+t²)t³ dt
=∫6t²/(1+t²)dt
=∫[6-6/(1+t²)] dt
= ∫6dt - 6∫1/(1+t²)dt
=6t-6acrtant+C
=6x^(1/6)-6arctanx^(1/6)+C
令t=x^(1/6),则x=t^6,dx=6t^5dt
则原式=∫6t^5/(1+t²)t³ dt
=∫6t²/(1+t²)dt
=∫[6-6/(1+t²)] dt
= ∫6dt - 6∫1/(1+t²)dt
=6t-6acrtant+C
=6x^(1/6)-6arctanx^(1/6)+C
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