Ngô Đức Bảo Nam
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2023-08-22 20:26:56
x-1 mũ 3=27
X-1 mũ 3= 3 mũ 3
=> x-1=3
X= 3+1=4
Vậy x=4.
2023-04-09 20:18:28
1+2-2-2+4+5+6-7-8+9+...+994-995-996+997+998
=1+(2-3-4+5)+(6-7-8+9)+...+(994-995-996+997)+998
=1+0+0+0+...+0+998
=1+998
=999
2023-03-11 13:32:33
1. He will get a cup of coffee next morning
2. The teacher won't punish that student
3. If he doesn't eat breakfast, he will be hungry
4. We can reuse bottles and cans
5. We shouldn't throw rubbish on the street