已知当m,n都是实数,且满足2m=8+n时,称p(m﹣1,
)为“开心点”.例如点A(5,3)为“开心点”.
因为当A(5,3)时,m﹣1=5,
=3,得m=6,n=4,
所以2m=2×6=12,8+n=8+4=12,
所以2m=8+n.
所以A(5,3)是“开心点”.
(1)判断点B(4,10)是否为“开心点”,并说明理由;
(2)若点M(a,2a﹣1)是“开心点”,请判断点M在第几象限?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cf584cd01a9faee3a7101e61327c538.png)
因为当A(5,3)时,m﹣1=5,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cf584cd01a9faee3a7101e61327c538.png)
所以2m=2×6=12,8+n=8+4=12,
所以2m=8+n.
所以A(5,3)是“开心点”.
(1)判断点B(4,10)是否为“开心点”,并说明理由;
(2)若点M(a,2a﹣1)是“开心点”,请判断点M在第几象限?并说明理由.
更新时间:2021-08-25 17:34:25
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