Question 30
Let
$$
F=\log\frac{1+x}{1-x}.
$$
Form a new function $G$ by replacing each $x$ in $F$ by
$$
\frac{3x+x^3}{1+3x^2},
$$
and simplify. The simplified expression $G$ is equal to:
$$
F=\log\frac{1+x}{1-x}.
$$
Form a new function $G$ by replacing each $x$ in $F$ by
$$
\frac{3x+x^3}{1+3x^2},
$$
and simplify. The simplified expression $G$ is equal to: