1) \(9\cdot9\cdot9\cdot9\cdot3\cdot3\)

\(=3\cdot3\cdot3\cdot3\cdot3\cdot3\cdot3\cdot3\cdot3\cdot3\)

\(=3^{10}\)

2) \(8\cdot2\cdot2\cdot2\cdot16\cdot4\)

\(=2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\)

\(=2^{12}\)

3) \(3\cdot3\cdot3\cdot3\cdot5\cdot5\cdot5\cdot5\)

\(=3^4\cdot5^4\)

4) \(25\cdot25\cdot25\cdot5\)

\(=5\cdot5\cdot5\cdot5\cdot5\cdot5\cdot5\)

\(=5^7\)

5) \(7\cdot49\cdot7\cdot7\cdot7\)

\(=7\cdot7\cdot7\cdot7\cdot7\cdot7\)

\(=7^6\)

6) \(8\cdot64\cdot8\cdot64\)

\(=2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\)

\(=2^{18}\)

7) \(2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot4\)

\(=2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\cdot2\)

\(=2^8\)

1) 3¹⁰

2) 2¹²

3)3⁴ . 5⁴

4) 5⁷

5) 7⁶

6)8⁶

7) 2⁸.

1) \(...=3^2.3^2.3^2.3^2.3^2=3^{10}\)

2) \(...=2^3.2^3.2^4.2^2=2^{12}\)

3) \(...=3^3.3.5.5.5.5=3^4.5^4\)

4) \(...=5^2.5^2.5^2.5=5^7\)

5) \(...=7.7^2.7.7.7=7^6\)

6) \(...=2^3.\left(2^3\right)^2.2^3.\left(2^3\right)^2=2^3.2^6.2^3.2^6=2^{18}\)

7) \(...=2^6.2^2=2^8\)

\(\text{∘ Ans}\)

\(\downarrow\)

\(\text{1)}\)

\(\text{9.9.9.9.3.3}\)

\(=9^4\cdot3^2\)

\(=\left(3^2\right)^4\cdot3^2\)

\(=\)\(3^8\cdot3^2=3^{10}\)

\(\text{2)}\)

\(\text{8.2.2.2.16.4}\)

\(=2^3\cdot2^3\cdot2^4\cdot2^2\)

\(=\)\(2^{3+3+4+2}=2^{12}\)

\(\text{3)}\)

\(\text{3.3.3.15.5.5.5}\)

\(=3^3\cdot3\cdot5\cdot5^3\)

\(=\)\(3^4\cdot5^4=\left(3\cdot5\right)^4=15^4\)

\(\text{4)}\)

\(\text{25.25.25.5}\)

\(=25^3\cdot5\)

\(=\left(5^2\right)^3\cdot5=5^6\cdot5=5^7\) 

\(\text{5)}\)

\(\text{7.49.7.7.7}\)

\(=7^4\cdot7^2\)

\(=7^6\)

\(\text{6)}\)

\(\text{8.64.8.64}\)

\(=8^2\cdot64^2\)

\(=8^2\cdot\left(8^2\right)^2\)

\(=8^2\cdot8^4\)

\(=8^6\)

\(\text{7)}\)

\(\text{2.2.2.2.2.2.4}\)

\(=2^6\cdot2^2\)

\(=2^8\)

Nguyễn Minh Dương

Phong

Nguyễn Đức Trí

Câu 3 là dưới dạng 1 lũy thừa à?

1) 3¹⁰

2) 2¹¹

3) 3⁴ . 5⁴

4) 5⁷

5) 7⁶

6) 8⁶

7) 2⁸

1) 310

2) 212

3)34 . 54

4) 57

5) 76

6)86

7) 28.