SubArea: DerivativeLevel: BProject ID: 9000070708Source Problem: 2010002009Accepted: 1Clonable: 1Differentiate the following function. f(x)=ln(1+x1−x)f′(x)=21−x2; x∈(−1;1)f′(x)=21−x2; x∈R∖{−1;1}f′(x)=1−x1+x; x∈(−1;1)f′(x)=1−x1+x; x∈R∖{−1;1}