3, 3, 15, 135, ( )。 A. 825 B. 1105 C. 1413 D. 1755

作者: tihaiku 人气: - 评论: 0

问题 3, 3, 15, 135, ( )。 A. 825 B. 1105 C. 1413 D. 1755

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答案 D

解析做商数列。3/ 3 = 1，15 /3 = 5，135/ 15 = 9，显然，1，5，9构成以4为公差的等差数列，下一项为9+4=13，故原数列的下一项为135X13 = 1755。故正确答案为D

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