16.函数y=x-x^2的值域是?,函数y=x-x^2(-1≤x≤1)的值域是?
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16.函数y=x-x^2的值域是?,函数y=x-x^2(-1≤x≤1)的值域是?
y=x-x^2
=-x^2+x-1/4+1/4
=-(x-1/2)^2+1/4
-(x-1/2)^2
=-x^2+x-1/4+1/4
=-(x-1/2)^2+1/4
-(x-1/2)^2