Revision as of 12:55, 23 June 2021 by Aopspandy(talk | contribs)(Created page with "==Problem== If <math>f(x)=\log \left(\frac{1+x}{1-x}\right)</math> for <math>-1<x<1</math>, then <math>f\left(\frac{3x+x^3}{1+3x^2}\right)</math> in terms of <math>f(x)</math>...")