f(2x+1)=x^2-2x,则f(3)=___________f(2x+1)=x^2-2x,则f(3)=___________

问题描述:

f(2x+1)=x^2-2x,则f(3)=___________
f(2x+1)=x^2-2x,则f(3)=___________

-1

当x=1时,f(3)=1^2-2*1=-1