Các bạn cho mình hỏi
So sánh hai phân số
-265/317 và -83/111
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các bạn cho mình hỏi
(5x -1)mũ 6 = 3 mũ 6
Ta có hai trường hợp
5x -1 = 3
5x = 3+1
5x = 4
x = 4:5
x = 4/5
-5x +1 = 3
-5x = 3-1
-5x = 2
Tìm a,b biết BCNN(a,b)+ƯCLN(a,b)=19
các bạn nhớ giải thích cặn kẽ giúp mình nhé
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He usually walks to school
He usually goes to school
có giống nhau không ?
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Tìm a và b
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Biết 7a-b chia hết cho 9
Chứng minh rằng 5a+b chia hết cho 9
Mình nhờ các bạn tư vấn thế này có đúng không?
2/3.1/3 + 2/5.1/7 + 2/9.1/7 + 2/9.1/11
= 2/15 + 2/35 + 2/63 + 2/99
Ta có 1 : (2/15 +...
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Dãn cách tên bằng dấu phẩy(,).