Given that f(x)=2x^2-12x+11, for the domain x>=0, find the range of f?
问题描述：
Given that f(x)=2x^2-12x+11, for the domain x>=0, find the range of f?
答
求f(x)的值域
f(x)=2x^2-12x+11
f(x)=2[(x-3)^2]-7
x≥0
根据图像得
f(x)有最小值-7
所以f（x)∈[-7,+∞）
the range of f