f(2x-1)=x^2-3x+2,求f(x)
问题描述:
f(2x-1)=x^2-3x+2,求f(x)
答
设t=2x-1
则x=(t+1)/2
f(t)=1/4*(t+1)^2-3(t+1)/2+2=1/4*t^2-t+3/4
f(x)=1/4*x^2-x+3/4