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14 tháng 9 2021

2 mũ 13 -2 nhé

17 tháng 9 2021

cả lời giải bạn ơi

27 tháng 12 2017

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28 tháng 12 2017

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23 tháng 8 2015

Cho a là số tự nhiênchia 6 dư 2 và b là số tự nhiên chia 6 dư 3. Chứng minh axb chia hết cho 6

Bài 3: 

a: \(3^x=243\)

nên \(3^x=3^5\)

hay x=5

b: \(x^5=32\)

nên \(x^5=2^5\)

hay x=2

c: \(x^6=729\)

\(\Leftrightarrow x^2=9\)

=>x=3 hoặc x=-3