Download - 宁县二中 2011-2012学年度第一学期中期考试 高二级数学
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2011-2012
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(12560)D2{an}nSn.a111a4a66Snn ()A6 B7C8 D9AD
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5()A. B. C. D.BCC
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6ABCABCabc(a2c2b2)tan BacB ()A. B.
C. D. D7{an} a1a2a3 5a7a8a910a4a5a6 ()A5 B7C6 D4A8xy zx2y ()A4 B3 C2 D1B
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10{an}20100a3a18 ()A50 B25C100 D2BAD
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12ABC ABCabcC120c ()Aab B.abCab DabA(4520)D
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13.14_________;
14ABCa4b6C120sin A________15 _________. 16 xRa_(____)_