f.2代數不等式
回答 (9)
2007-03-28 5:03 am
✔ 最佳答案
1) 2(8- m/2) > 2- 3/2 (m-5)16 - m > 2 - 3/2m + 15/2
16 - m > 2 - 1.5m + 7.5
16 - 2 - 7.5 > m-1.5m
-0.5m > 6.5
m < -13
2007-03-27 21:17:30 補充：
顛倒了正負號...-0.5m 6.5m -13
參考: 自己
2007-03-29 9:13 pm
1) 2(8- m/2) > 2- 3/2 (m-5)
16 - m > 2 - 3/2m + 15/2
1/2m>-14+15/2
1/2m>-13/2
m>-13
16 - m > 2 - 3/2m + 15/2
1/2m>-14+15/2
1/2m>-13/2
m>-13
參考: 自己
2007-03-28 6:14 am
2(8-m/2) > 2-3/2(m-5) 跟 2(8-m/2) > 2-3/[2(m-5)] 是不同的, 請留意.
我想, 你想問的是前者.
答案應該是 m >-13. 上面已有朋友答對, 不在此重覆, 其他人都答錯.
我想, 你想問的是前者.
答案應該是 m >-13. 上面已有朋友答對, 不在此重覆, 其他人都答錯.
2007-03-28 5:27 am
2(8-2/m) 2-2/3(m-5)
=16-m =2-2/3m-15
=2/4-3m+15
=2/19-3m
32-2m >9-3m
32-2m-19+3m>0
13+m>0
m<-13
=16-m =2-2/3m-15
=2/4-3m+15
=2/19-3m
32-2m >9-3m
32-2m-19+3m>0
13+m>0
m<-13
參考: me
2007-03-28 5:20 am
1)2(8- m/2) > 2- 3/2 (m-5)
16-m/2>2-3/2m-7.5
16-2+7.5>-3/2m+m/2
21.5>-m
m>2.5
16-m/2>2-3/2m-7.5
16-2+7.5>-3/2m+m/2
21.5>-m
m>2.5
參考: myself
2007-03-28 5:17 am
2(8- m/2) > 2- 3/2 (m-5)
16 - m > 2 - 3/2m + 15/2
16 - 2 - 7.5 > m-1.5m
-0.5m > 6.5
m < -13
=======
16 - m > 2 - 3/2m + 15/2
16 - 2 - 7.5 > m-1.5m
-0.5m > 6.5
m < -13
=======
2007-03-28 5:07 am
2(8- m/2) > 2- 3/2 (m-5)
R.H.S. = 2 - 3m/2 + 15/2
= 9.5 - 1.5m
L.H.S = 16 - m
= 24 - 1.5m
Because 24 -1.5m > 9.5 -1.5m, so 2(8- m/2) > 2- 3/2 (m-5)
R.H.S. = 2 - 3m/2 + 15/2
= 9.5 - 1.5m
L.H.S = 16 - m
= 24 - 1.5m
Because 24 -1.5m > 9.5 -1.5m, so 2(8- m/2) > 2- 3/2 (m-5)
參考: myself
2007-03-28 5:07 am
2(8- m/2) > 2- 3/2 (m-5)
16-2m>4-6/(M-5)
16-2m+6/(m-5)>4
16-2m+6>4m-20
42>6m
7>m
答案詳盡
16-2m>4-6/(M-5)
16-2m+6/(m-5)>4
16-2m+6>4m-20
42>6m
7>m
答案詳盡
2007-03-28 5:07 am
16-m>2-3/2m+15/2
16-m>-3/2m+19/2
1/2m>-13/2
m>-13
16-m>-3/2m+19/2
1/2m>-13/2
m>-13
收錄日期: 2021-04-12 21:38:53
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