If `f(x)=log((1-x)/(1+x))` then `f((1-x)/(1+x))=`

If f(x)=log((1+x)/(1-x)) , then f((2x)/(1+x^2)) equal to:

If f(x)=log((1+x)/(1-x)), then (a) f(x_(1))f(x)=f(x_(1)+x_(2))(b)f(x+2)-2f(x+1)+f(x)=0 (c) f(x)+f(x+1)=f(x^(2)+x)(d)f(x_(1))+f(x_(2))=f((x_(1)+x_(2))/(1+x_(1)x_(2)))

If f(x) = log ((1+x)/(1-x)) , then f((2x)/(1+x^(2))) is equal to

If f(x) = log ((1+x)/(1-x)) , then f((2x)/(1+x^(2))) is equal to

If f(x)=log((1+x)/(1-x)) , "then f "((2x)/(1+x^(2))) is equal to

If f(x)=log.(1+x)/(1-x) then f((x_(1)+x_(2))/(1+x_(1)x_(2)))=

If f(x)=log_(e)((1-x)/(1+x)),|x|<1, then f((2x)/(1+x^(2))) is equal to: