你做过这几道题吗

9.At the start of an experiment, a certain population consisted of 3 animals. At the end of each month after the start of the experiment, the population size was double its size at the beginning of that month . Which of the following represents the population size at the end of 10 months?

A  2^3   B     3^2  C   2(3^10)   D    3(2^10)    E   3(10^2)

答案是d，可我不知道3哪来的。

10. If d=1/(2^3*5^7) is expressed as a terminating decimal, how many nonzero digits will d have?

A 1  B 2  C 3  D 7  E 10

记得og里一道题把分母化成999。。但这倒题好象不是这个思路

25

if m is the least common multiple of 90,196 and 300, which of the following is not a factor of M？

A  600    B  700     C 900      D 2100      E 4900

我选了e，答案为a

请指教！

请标明出处，方便后人查找

25

if m is the least common multiple of 90,196 and 300, which of the following is not a factor of M？

A  600    B  700     C 900      D 2100      E 4900

我选了e，答案为a

答案是A

因为 600含有2^3

自己都弄懂了，

不用麻烦各位了

呵呵，好简单哦，怪不得没人理我

标明了啊，是ff宝典里面的，是后面的补充部分

可是我没有看到讨论贴，