1.已知0小于x小于4,X分之4+(4-x)分之1的最小值————2.已知数列{an(n是下标)}(n属于正整数),函数fn(n是下标)(x)=x的平方+3nx+an(n是下标).若对一切正整数n,数列{bn(n是下标)}
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![1.已知0小于x小于4,X分之4+(4-x)分之1的最小值————2.已知数列{an(n是下标)}(n属于正整数),函数fn(n是下标)(x)=x的平方+3nx+an(n是下标).若对一切正整数n,数列{bn(n是下标)}](/uploads/image/z/2756802-66-2.jpg?t=1.%E5%B7%B2%E7%9F%A50%E5%B0%8F%E4%BA%8Ex%E5%B0%8F%E4%BA%8E4%2CX%E5%88%86%E4%B9%8B4%2B%284-x%29%E5%88%86%E4%B9%8B1%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E2%80%94%E2%80%94%E2%80%94%E2%80%942.%E5%B7%B2%E7%9F%A5%E6%95%B0%E5%88%97%EF%BD%9Ban%EF%BC%88n%E6%98%AF%E4%B8%8B%E6%A0%87%EF%BC%89%EF%BD%9D%EF%BC%88n%E5%B1%9E%E4%BA%8E%E6%AD%A3%E6%95%B4%E6%95%B0%EF%BC%89%2C%E5%87%BD%E6%95%B0fn%EF%BC%88n%E6%98%AF%E4%B8%8B%E6%A0%87%EF%BC%89%EF%BC%88x%EF%BC%89%3Dx%E7%9A%84%E5%B9%B3%E6%96%B9%2B3nx%2Ban%EF%BC%88n%E6%98%AF%E4%B8%8B%E6%A0%87%EF%BC%89.%E8%8B%A5%E5%AF%B9%E4%B8%80%E5%88%87%E6%AD%A3%E6%95%B4%E6%95%B0n%2C%E6%95%B0%E5%88%97%EF%BD%9Bbn%EF%BC%88n%E6%98%AF%E4%B8%8B%E6%A0%87%EF%BC%89%EF%BD%9D)
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