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`int(x^(3))/(x^(4)+2)dx` का मान ज्ञात कीजिए ।

Answer» माना `I=int(x^(3))/(x^(4)+2)dx`
माना `" "x^(4)+2=t`
`rArr" "4x^(3)=(dt)/(dx)`
`rArr" "x^(3)dx=(dt)/(4)`
`therefore" "I=int(dt)/(4.t)=(1)/(4)log|t|+c`
`" "=(1)/(4)log|x^(4)+2|+c`


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