Question

设f(x)=2x+3,g(x+2)=f(x),则g(x)等于

A.2x+1                                                        B.2x－1

C.2x－3                                                       D.2x+7

Answer 1

解析:由g(x+2)=2x+3,设x+2=t,则g(t)=2t－1.

答案:B