Question

12^{7 :} 6⁷

18^{3 :} 9³

27⁵ : 81³

125³ : 25⁴

Answer 1

1. \(12^7:6^7=\left(6.2\right)^7:6^7=6^7.2^7:6^7=2^7\)

2.\(18^3:9^3=\left(9.2\right)^3:9^3=9^3.2^3:9^3=2^3\)

3.\(27^5:81^3=\left(3^3\right)^5:\left(3^4\right)^3=3^{15}:3^{12}=3^3\)

4.\(125^5:25^4=\left(25^2\right)^5:25^4=25^{10}:25^4=25^6\)

Học tốt nha bạn!

Answer 2

a, 12⁷ : 6⁷ = (12 : 6)⁷ = 3⁷
b, 18³ : 9³ = (18 : 9)³ = 2³
c, 27⁵ : 81³ = (3³)⁵ : (3⁴)³ = 3¹⁵ : 3¹² = 3³
d, 125³ : 25⁴ = (5³)³ : (5²)⁴ = 5⁹ : 5⁸ = 5
@Ribi Shchi