题目内容：

f(2的x次方)=4的x次方+3x2的x次方+1,求f(x)的解析式

优质解答

f(2的x次方)=4的x次方+3*2的x次方+1
=> f(2的x次方)=(2的x次方)^2+3*(2的x次方)+1
令y=(2的x次方)
=> f(y)=y^2+3*y+1