x^2+(2t+1)x+(t+1)^2

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x^2+(2t+1)x+(t+1)^2x^2+(2t+1)x+(t+1)^2x^2+(2t+1)x+(t+1)^2f(x)=x^2+(2t+1)x+(t+1)^2

x^2+(2t+1)x+(t+1)^2
x^2+(2t+1)x+(t+1)^2<=0 x属于[1,m]恒成立,求m最大值

x^2+(2t+1)x+(t+1)^2
f(x)=x^2+(2t+1)x+(t+1)^2