y=根号下x(x-1)+根号下x{x(x-1)>=0{x>=0所以x>=1或x<=0且x>=0即定义域为:{x|x>=1或x=0}
y=根号下x(x-1)+根号下x有意义则x(x-1)≥0，x≥0则x-1≥0,x≥0则x≥1所以函数y=根号下x(x-1)+根号下x的定义域为x≥1
x》=1
