函数f(x)=x^2-3x+2m在区间【-2,2】上只有一个零点,求m的取值范围.
人气:218 ℃ 时间:2020-04-03 19:21:42
解答
这题利用数形结合很方便!你画个坐标轴,用区间端点代入函数,然后还要考虑判别式,注意多种情况即可.请问要考虑对称轴吗?
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