0 bình luận về “Môn Toán Lớp 6: A) 2 mũ 10: 8 mũ 2 b) 27 mũ 5 : 81 mũ 3 c ) 10 mũ 6:100 d)5 mũ 9: 25 mũ 3 e) 4 mũ 10: 64 mũ 3 2 mũ 25 : 32 mũ 4 18 mũ 4: 9 mũ 4 nhanh”

1. a, 2^10 : 8^2

   = 2^10 : (2^3)^2

   = 2^10 : 2^6

   = 2^(10-6)

   = 2^4

   = 16

   b, 27^5 : 8^3

   = (3^3)^5 : (3^4)^3

   = 3^15 : 3^12

   = 3^(15-12)

   = 3^3

   = 27

   c, 10^6 : 100

   = 10^6 : 10^2

   = 10^(6-2)

   = 10^4

   = 10000

   d, 5^9 : 25^3

   = 5^9 : (5^2)^3

   = 5^9 : 5^6

   = 5^(9-6)

   = 5^3

   = 125

   e, 4^10 : 64^3

   = (2^2)^10 : (2^6)^3

   = 2^20 : 2^18

   = 2^(20-18)

   = 2^2

   = 4

   f, 2^25 : 32^4

   = 2^25 : (2^5)^4

   = 2^25 : 2^20

   = 2^(25-20)

   = 2^5

   = 32

   g, 18^4 : 9^4

   = (18:9)^4

   = 2^4

   = 16

   Trả lời
2. a, 2^10 : 8^2 = 2^10 : 2^6 = 2^4

   b, 27^5 : 81^3 = 3^15 : 3^12 = 3^3

   c, 10^6 : 100 = 10^6 : 10^2 =10^4

   d, 5^9 : 25^3 = 5^9 : 5^6 = 5^3

   e, 4^10 : 64^3 = 4^10 : 4^9 = 4

   2^25 : 32^4 = 2^25 :2^20= 2^5

   18^4 : 9^4 = (18 : 9)^4 = 2^4

   _____________________

   (a^m)^n = a^(mn)

   a^m : b^m = (a : b)^m = (a/b)^m (b ne 0)

   a^m . a^n = a^(m + n)

   a^m : a^n = a^(m – n) .

    

   Trả lời