题目内容
已知A不等于零,且A×
=B×
=C÷
=D×
=E÷
,把A、B、C、D、E从小到大排列起来.
| 5 |
| 3 |
| 9 |
| 10 |
| 3 |
| 4 |
| 4 |
| 5 |
| 6 |
| 5 |
分析:令A×
=B×
=C÷
=D×
=E÷
=1,分别求出五个数的值,再比较大小即可.
| 5 |
| 3 |
| 9 |
| 10 |
| 3 |
| 4 |
| 4 |
| 5 |
| 6 |
| 5 |
解答:解:令A×
=B×
=C÷
=D×
=E÷
=1,
则A×
=1,A=
,
B×
=1,B=
=
,
C÷
=1,C=
,
D×
=1,D=
=
,
E÷
=1,E=
=
,
又因
>
,
>
>
,
所以
>
>
>
>
,
所以A<C<B<E<D.
| 5 |
| 3 |
| 9 |
| 10 |
| 3 |
| 4 |
| 4 |
| 5 |
| 6 |
| 5 |
则A×
| 5 |
| 3 |
| 3 |
| 5 |
B×
| 9 |
| 10 |
| 10 |
| 9 |
| 200 |
| 180 |
C÷
| 3 |
| 4 |
| 3 |
| 4 |
D×
| 4 |
| 5 |
| 5 |
| 4 |
| 225 |
| 180 |
E÷
| 6 |
| 5 |
| 6 |
| 5 |
| 216 |
| 180 |
又因
| 3 |
| 4 |
| 3 |
| 5 |
| 225 |
| 180 |
| 216 |
| 180 |
| 200 |
| 180 |
所以
| 5 |
| 4 |
| 6 |
| 5 |
| 10 |
| 9 |
| 3 |
| 4 |
| 3 |
| 5 |
所以A<C<B<E<D.
点评:此类题目一般都利用特殊值法,求出字母的值,再比较大小即可.
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