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[Data Sufficiency]

试题详情

题目:

If r is a constant and an = r·n for all positive integers n, for how many values of n is an < 100?
(1)     a50 = 500
(2)     a100 + a105 = 2,050

选项:

答案:

D

提问:

DS

解答:

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阅读574
解答: sysadmin

提问:

DS

解答:

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阅读575
解答: sysadmin老师

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