题目内容
若x |
3 |
y |
4 |
z |
5 |
4x+3y-2z |
x+y+z |
分析:根据等比性质设
=
=
=m,则有x=3m,y=4m,z=5m,代入原式即可得出答案.
x |
3 |
y |
4 |
z |
5 |
解答:设
=
=
=m,
∴x=3m,y=4m,z=5m,
代入原式得:
=
=
.
故答案为
.
x |
3 |
y |
4 |
z |
5 |
∴x=3m,y=4m,z=5m,
代入原式得:
12m+12m-10m |
3m+4m+5m |
14m |
12m |
7 |
6 |
故答案为
7 |
6 |
点评:本题主要考查了等比性质,比较简单.
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