已知f(x)=(x∈R且x≠-1),+2(x∈R).
(1)求f(2),g(2)的值;
(2)求f(g(2))的值;
(3)求f(g(x)).
解:(1)f(2)==,=6;
(2)f(g(2))=f(6)=;
==.