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- 精华
- 0
- 积分
- 47
- 经验
- 47 点
- 威望
- 0 点
- 金钱
- 79 ￥
- 魅力
- 47
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一道难题
In sequence Q, the first number is 1/2, and each subsequent number in the sequence is determined by doubling the previous number and then adding 2. How many times does the units digit 8 appear in the first 15 number of the sequence?
a.7 b.8 c.10 d.12 e.13 |
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