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[函数] 函数零点

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lrh2006 Posted at 2014-7-21 07:58:08 |Read mode

若函数f(x)=x^2+ax+2b在区间(0,1),(1,2)内各有一个零点，则a^2+(b-2)^2的取值范围是?我已经做出来了。我想问的是，不用线性规划，这个题目可以求出a,b的范围吗？还有，本题可以用向量解决吗？谢谢！

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wzxsjz Posted at 2014-7-21 14:56:40

$f(x)=x^{2}+ax+2b$

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