`(x)/(9-4x^(2))`

Explanation

`int(x)/(9-4x^(2))dx" माना "9-4x^(2)=t`
`=int(1)/(t).(dt)/(-8)" "rArr -8x dx =dt`
`=-(1)/(8)log|t|+c" "rArr xdx =(dt)/(-8)`
`=-(1)/(8)log|9-4x^(2)|+c`