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数学5(必修)第二章:数列(A卷)一、选择题1.在数列55,34,21,,8,5,3,2,1,1x中,x等于()A.11B.12C.13D.142.等差数列9}{,7,3,}{51第... 2025-03-291301128.5 KB6页139
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