21, 23, 26, 31, 38, ( ), 62。
2023-06-11
A. 47
B. 49
C. 51
D. 53
参考答案:B
B. 49
C. 51
D. 53
参考答案:B
这组数列做一次差运算,可得新数列为2,3,5,7,(),(),是一组质数数列,可知下两项当为11和13,38+11=49,49+13=62.故答案为B。
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