[f(x)=2x-tan^(-1)x-log(x+sqrt(x^(2)+1))" is monotonicaly "],[" increasing when "]

f(x)=2x-tan^(-1)x-log{x+sqrt(x^(2)+1)} is monotonically increasing when (a) x>0 (b) x<0( c) x in R( d ) x in R-{0}

f(x)=2x-tan^(-1)x-log{x+sqrt(x^2+1)} is monotonically increasing when (a) x >0 (b) x<0 (c) x in R (d) x in R-{0}

f(x)=2x+cot^(-1)x+log (sqrt(1+x^(2))-x)

f(x)=2x-tan^(-1)x-ln(x+sqrt(1+x^(2)));x in R then

f(x)=2x-tan^(-1)x-log(x+sqrt(1+x^(2)))(x>0) is increasing in

f (x) =2x -tan ^(-1) x - ln (x+ sqrt(1+ x ^(2)))

f(x)=2x-Tan^(-1)x-log(x+sqrt(1+x^(2))(xgt0) is increasing in

f(x)=2x-tan^(-1)x-log|x+sqrt(1+x^(2))| is ……….. (x in R)

f(x)=2x+cot^(-1)x-log|x + sqrt(1+x^(2))| is …………..