y=x-1/3x^2-6x+4的值域y=(x-1)/(3x^2-6x+4)的值域
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y=x-1/3x^2-6x+4的值域y=(x-1)/(3x^2-6x+4)的值域
y=x-1/3x^2-6x+4的值域
y=(x-1)/(3x^2-6x+4)的值域
y=x-1/3x^2-6x+4的值域y=(x-1)/(3x^2-6x+4)的值域
y=(x-1)/[3(x-1)^2+1]
=1/[3(x-1)+1/(x-1)]
因为3(x-1)+1/(x-1)>=2根号3或