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The numbers 3, 10, 17, 24, 31 and 38 are the first six terms of an infinite sequence in which each term after first is 7 greater
The numbers 3, 10, 17, 24, 31 and 38 are the first six terms of an infinite sequence in which each term after first is 7 greater
admin
2021-10-21
51
问题
The numbers 3, 10, 17, 24, 31 and 38 are the first six terms of an infinite sequence in which each term after first is 7 greater than the preceding term. What is the 45th term of the sequence?
选项
A、308
B、311
C、312
D、315
E、318
答案
B
解析
题目中的序列是一个等差数列a
1
=3,公差d=7,那么a
45
=a
1
+(45-1)×7=311。
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本试题收录于:
GMAT QUANTITATIVE题库GMAT分类
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GMAT QUANTITATIVE
GMAT
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