egin{array}{l}已知函数f(x)=x-frac{1}{x+1},g(x)={x}^{2}-2ax+4,若∀{x}_{1}∈[0,1],∃{x}_{2}∈[1,2]

题目

egin{array}{l}已知函数f(x)=x-frac{1}{x+1},g(x)={x}^{2}-2ax+4,若∀{x}_{1}∈[0,1],∃{x}_{2}∈[1,2],\ 使f({x}_{1})≥g({x}_{2}),则实数a的取值范围是end{array}

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