求解数学题Q_Q
答案:4 悬赏:20 手机版
解决时间 2021-03-13 03:50
- 提问者网友：低吟詩仙的傷
- 2021-03-12 22:42
求解数学题Q_Q
最佳答案
- 五星知识达人网友：持酒劝斜阳
- 2021-03-12 22:47
5c－3a≤b
b≤4c－a
a,b,c>0
5c-3a+3b<=b+12c-3a,2b<7c,c>2b/7
20c-12a+5b<=4b+20c-5a,b<=7a,a>=b/7,b/a<=7
b>c>a
7/2>b/c>1,0c㏑b≥a＋c㏑c,ln(b/c)>=a/c
1<=b/c<=e
b/a>=e
综上：e<=b/a<=7
b≤4c－a
a,b,c>0
5c-3a+3b<=b+12c-3a,2b<7c,c>2b/7
20c-12a+5b<=4b+20c-5a,b<=7a,a>=b/7,b/a<=7
b>c>a
7/2>b/c>1,0c㏑b≥a＋c㏑c,ln(b/c)>=a/c
1<=b/c<=e
b/a>=e
综上：e<=b/a<=7
全部回答
- 1楼网友：街头电车
- 2021-03-13 01:05
天啊
- 2楼网友：神鬼未生
- 2021-03-13 00:40
5c－3a≤b b≤4c－a a,b,c>0 5c-3a+3b<=b+12c-3a,2b<7c,c>2b/7 20c-12a+5b<=4b+20c-5a,b<=7a,a>=b/7,b/a<=7 b>c>a 7/2>b/c>1,0=a/c 1<=b/c<=e b/a>=e 综上：e<=b/a<=7赞同1|评论
- 3楼网友：枭雄戏美人
- 2021-03-12 23:24
5c－3a≤b
b≤4c－aa,b,c>05c-3a+3b<=b+12c-3a,2b<7c,c>2b/720c-12a+5b<=4b+20c-5a,b<=7a,a>=b/7,b/a<=7b>c>a7/2>b/c>1,0=a/c1<=b/c<=eb/a>=e
b≤4c－aa,b,c>05c-3a+3b<=b+12c-3a,2b<7c,c>2b/720c-12a+5b<=4b+20c-5a,b<=7a,a>=b/7,b/a<=7b>c>a7/2>b/c>1,0=a/c1<=b/c<=eb/a>=e
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