If `l^r(x)` means `logloglog.......x` being repeated `r` times, then `int [ (x l(x) l^2(x) l^3(x) .... l^r (x)]^(-1) dx` is equal to :

If l^r(x) means logloglog...... x , the log being repeated r times, then int[x l(x)l^2(x)l^3(x)..... l^r(x)]^(-1)d x is equal to l^(r+1)(x)+C (b) (l^(r+1)(x))/(r+1)+C (c) l^r(x)+C (d) none of these

If l^ ( r) (x) means log log log ….x (log being repeated r times ) , then int [x l (x)l^(2)(x)l^(3)(x)…..l^( r) (x)]^(-1)dx equals :

If l^(prime)(x) means logloglog x , the log being repeated r times, then int[x l(x)l^2(x)l^3(x) l^(prime)(x)]^(-1)d s is equal to l^(r+1)(x)+C (b) (l^(r+1)(x))/(r+1)+C l^r(x)+C (d) none of these

If l^(prime)(x) means logloglog x , the log being repeated r times, then int[x l(x)l^2(x)l^3(x) l^(prime)(x)]^(-1)d s is equal to l^(r+1)(x)+C (b) (l^(r+1)(x))/(r+1)+C l^r(x)+C (d) none of these

If l^(prime)(x) means logloglog x , the log being repeated r times, then int[x l(x)l^2(x)l^3(x) l^(prime)(x)]^(-1)d s is equal to l^(r+1)(x)+C (b) (l^(r+1)(x))/(r+1)+C l^r(x)+C (d) none of these

If l^(r)(x) means log log log...x,the log being repeated r xx,then int[x.l(x)*l^(2)(x)*l^(3)(x)...I^(r)(x)]^(-1)dx is equal to

If l^(r)(x) means log log log......log x, the log being repeated r xx,then int(1)/(xl(x)l^(2)(x)l^(3)(x)...l^(r)(x))dx

l=int(dx)/(1+e^(x)) is equal to