求二次函数y=x^2-2ax+2在【2,4】上的最大值和最小值
人气:265 ℃ 时间:2019-08-18 11:50:45
解答
对称轴是x=a
①当a4时
x=4时最小y=18-8a
x=2时最大y=6-4a
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