1.

If l'(x) means log log log .... (x), the 'log' being repeated 'r' times, then int (1)/(x l (x )l^(2) (x )l^(3) (x)- - - l^(x) (x))dx =

Answer»

`L^(R)` ( x) + c
`l^(r + 1)`(x ) + c
`(l^(r + 1)(x))/(r + 1)`
`(l^(r)(x))/(r) + c`

Answer :B


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