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2023-08-07 22:26:44
3x+2ϵƯ(60)
=>3x+2ϵ{-1;-2;-3;-4;-5;-6;-10;-12;-15;-20;-30;-60;
1;2;3;4;5;6;10;12;15;20;30;60}
Ta thấy:3x chia 3 dư 0
2 chia 3 dư 2
=>3x+2 chia 3 dư 2
=>3x+2ϵ{............}
=>3xϵ{..........}
=>xϵ{..........}
Vậy.........
2023-08-07 22:21:38
k)125^5:25^3=5^15:5^6=5^9
l)27^6:9^3=3^18:3^6=3^12
m)4^20:2^15=2^40:2^15=2^25
n)24^n:2^2n=24^n:4^n=6^n
p)64^4.16^5:4^20=2^24.2^20:2^40=2^8
q)32^4:8^6=2^20:2^18=2^2
2023-08-06 15:13:10
312-202
=(31-20).(31+20)
=11.51
=561
2023-08-06 15:12:51
312-202
=(31-20).31+20)
=11.51
=561
2023-07-23 17:36:40
2023-07-23 17:35:12
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