问题描述:
If a is an odd number,then there must exist an integer such that a²-1=()求数学答案
A.3n,B.5n,C.8n ,D.16n
选择
A.3n,B.5n,C.8n ,D.16n
选择
问题解答:
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问题描述:
问题解答:
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