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In a list of $$16$$ consecutive multiples of $$5$$, ordered from least to greatest, the difference the $$2$$nd and $$15$$th numbers is what fraction of the difference between the first and last numbers?
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· 相关考点
6.2.2 等比数列
6.2.2 等比数列
以上解析由 考满分老师提供。
