2 |
3 |
3 |
4 |
因?yàn)?span>
2 |
3 |
8 |
12 |
3 |
4 |
9 |
12 |
所以
3 |
4 |
2 |
3 |
又如真分?jǐn)?shù)
3 |
5 |
4 |
6 |
因?yàn)?span>
3 |
5 |
18 |
30 |
4 |
6 |
20 |
30 |
所以
4 |
6 |
3 |
5 |
由此可斷定一個(gè)真分?jǐn)?shù)的分子和分母都增加1,這個(gè)分?jǐn)?shù)值將變大;
故選:B
a |
b |
2 |
3 |
3 |
4 |
2 |
3 |
8 |
12 |
3 |
4 |
9 |
12 |
3 |
4 |
2 |
3 |
3 |
5 |
4 |
6 |
3 |
5 |
18 |
30 |
4 |
6 |
20 |
30 |
4 |
6 |
3 |
5 |