0.5x + 1 is = to or < than 1.3x-2?
回答 (5)
2008-09-18 10:29 am
✔ 最佳答案
0.5x + 1 =< 1.3x - 21 + 2 =< 1.3x - 0.5x
3 =< 0.8x
3.75 =< x
x >= 3.75
2008-09-18 5:30 pm
0.5x + 1 <= 1.3x - 2
5x + 10 <= 13x - 20
- 8x <= - 30
- 4x <= - 15
- x <= - 15/4
x >= 3 3/4
Answer: x >= 3 3/4
5x + 10 <= 13x - 20
- 8x <= - 30
- 4x <= - 15
- x <= - 15/4
x >= 3 3/4
Answer: x >= 3 3/4
2008-09-18 6:18 pm
0.5x + 1 ⤠1.3x - 2
0.5x - 1.3x ⤠-1 - 2
-0.8x ⤠-3
x ⥠-3/-0.8
x ⥠3.75 (15/4)
0.5x - 1.3x ⤠-1 - 2
-0.8x ⤠-3
x ⥠-3/-0.8
x ⥠3.75 (15/4)
2008-09-18 5:31 pm
0.5x + 1 = < 1.3x-2
1 + 2 = < 1.3x - 0.5x
3 = < 0.8x
x => 3.75
1 + 2 = < 1.3x - 0.5x
3 = < 0.8x
x => 3.75
2008-09-18 5:31 pm
0.5x+1=<1.3x-2
3=<0.8x
3.75=<x
x=>3.75
3=<0.8x
3.75=<x
x=>3.75
收錄日期: 2021-05-01 11:14:33
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