\(5^6:5^3=5^{6-3}=5^3\)

\(a^4:a=a^4:a^1=a^{4-1}=a^3\)

a)=5³

b)=a³

a) 5^3 x 5^6

= 5^3+6

= 5^9

b) 3^4 x 3

= 3^4+1

= 3^5

nha bn

a) 5³ . 5⁶ = 5⁹ ; b) 3⁴ . 3 = 3⁵

5^6 : 5^3 = 5^3

a^4 : a = a^3

k mình nha

5⁶:5³=5^6-3=5³

a⁴:a=a^4-1=a³

a) 6^3.2^2.3

=(2.3)^3.2^2.3

=2^3.3^3.2^2.3

=(2^3.2^2).(3^3.3)

=2^5.3^4

\(6^3.2^2.3\)

\(=6^3.2.2.3\)

\(=6^3.6.2\)

\(=6^4.2\)

Mk chỉ làm được thế thôi

1.
a) \(3^4\times3^5\times3^6=3^{4+5+6}=3^{15}\)

b) \(5^2\times5^4\times5^5\times25=5^2\times5^4\times5^5\times5^2=5^{2+4+5+2}=5^{13}\)

c) \(10^8\div10^3=10^{8-3}=10^5\)

d) \(a^7\div a^2=a^{7-2}=a^5\)

2.

\(987=900+80+7\\ =9\times100+8\times10+7\\ =9\times10^2+8\times10^1+7\times10^0\)

\(2021=2000+20+1\\ =2\times1000+2\times10+1\times1\\ =2\times10^3+2\times10^1+1\times10^0\)

\(abcde=a\times10000+b\times1000+c\times100+d\times10+e\times1\\ =a\times10^4+b\times10^3+c\times10^2+d\times10^1+e\times10^0\)

Viết kết quả phép tính dưới dạng một lũy thừa :

a) 3^15 :3^5=59049=3^10

b) 4^6 :4^6=1=4^0

a) \(3^{15}:3^5=3^{15-5}\)

                  \(=3^{10}\)

b) \(4^6:4^6=4^{6-6}\)

                \(=4^0\)

a/ (2⁶.16) :4²

=(2⁶.2²) :(2²)²

=2⁸ : 2⁴=2⁴=16

b/ (5¹⁰:625) : 25

= (5¹⁰:5⁴) :5²

=5⁶ : 5²=5³=625

c/ (81.243):3

= (3⁴.3⁵) :3

= 3⁹ :3=3⁸ =6561