云南省昭通市2025届高三上学期1月毕业生诊断性检测数学答案
昭通市2025届高中毕业生诊断性检测数学参考答案一、单项选择题(本大题共8小题,每小题5分,共40分.在每小题给出的四个选项中,只有一项符合题目要求)题号12345678答案BABDCCAD【解析】1.由集合A得,所以,故选B.2.,故选A.3.由知,所以,故选B.4.该组数据的中位数为,极差为15,故,则,,则第60百分位数为10,故选D.5.方法一:整理为,则则直线恒过定点(3,1),而,定点在圆内,则直线与圆必有2个交点,故选C.方法二:联立直线与圆的方程,判别式大于0,故选C.6.经分析函数在上单调递增,由题意又因为,则或若,由零点存在性定理若,而,由零点存在性定理综上所述,则C一定正...
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