四川省成都七中2022-2023学年高三上学期入学考试理科数学答案

1理科参考答案一.选择题1—5:ACBDB6—10:BBCAC11—12:CD二.填空题13.414.1200+300315.2216.4三.解答题17.解:(1)由于Saaa2555315,Saaa2999519,所以SaSa93159553,又a63,所以a105,故daa22153.所以aandnn323;(2)bnnan24,cabnnnnn24,则Tnnn24224242nn2124442nnnnnn31441441422.18解:(1)如图,过...
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