a)\(4^3.2^4\div\left(4^2.\frac{1}{32}\right)\)

\(=\left(2^2\right)^3.2^4\div\left(2^2\right)^2\div32\).

\(=2^{\left(2.3\right)}.2^4\div2^{\left(2.2\right)}\div2^5\)

\(=2^6.2^4\div2^4\div2^5\)

\(=2^{6+4-4-5}=2^1\)

b)\(\left(\frac{1}{5}\right)^5=\frac{1}{5^5}=\left|5^5\right|=5^{-5}\)

\(\frac{1}{125}=\frac{1}{5^3}=\left|5^3\right|=5^{-3}\)

c)\(\frac{4}{25}=\frac{2^2}{5^2}=\left(\frac{2}{5}\right)^2=0,4^2\)

\(\frac{-8}{125}=\frac{-2^3}{5^3}=\left(\frac{-2}{5}\right)^2=-0,4^3=0,4^{-3}\)

\(\frac{16}{625}=\frac{2^4}{5^4}=\left(\frac{2}{5}\right)^4=0,4^4\)

3^7 : 3^5 = 3^7-5 = 3^2 = 9

5^9 : 5^3 = 5^9-3 = 5^3 = 125

9^10 : 9^8 = 9^10-8 = 9^2 = 81

\(3^7:3^5=3^{7-5}=3^2\)

\(5^9:5^3\)\(=5^{9-3}=5^6\)

\(9^{10}:9^8=9^{10-8}=9^2\)

\(nha^{ }\)

\(S=2\left(1+2\right)+2^3\left(1+2\right)+...+2^{11}\left(1+2\right)=3\left(2+2^3+...+2^{11}\right)⋮3\)

\(S=2\left(1+2+2^2\right)+...+2^{10}\left(1+2+2^2\right)=7\left(2+...+2^{10}\right)⋮7\)

Vì S chia hết cho 2 và S chia hết cho 3 

nên \(S⋮6\)

12³.3³=(12.3)³=36³

\(12^3\cdot3^3=\left(12\cdot3\right)^3=36^3\)

\(\overline{aaa}+\overline{bbb}=111.a+111.b=111\left(a+b\right)=37\times3\times\left(a+b\right)⋮37\)

a) Cách 1: \(\left(3^2\right)^3=3^{2.3}=3^6\)

\(\left(3^3\right)^2=3^{3.2}=3^6\)

\(\left(3^2\right)^5=3^{2.5}=3^{10}\)

\(9^8=\left(3^2\right)^8=3^{2.8}=3^{16}\)

\(27^6=\left(3^3\right)^6=3^{3.6}=3^{18}\)

\(81^{10}=\left(3^4\right)^{10}=3^{4.10}=3^{40}\)

Cách 2: \(\left(3^2\right)^3=9^3\)

\(\left(3^3\right)^2=3^{3.2}=\left(3^2\right)^3=9^3\)

\(\left(3^2\right)^5=9^5\)

\(9^8\)

\(27^6=\left(3^3\right)^6=3^{3.6}=3^{18}=3^{2.9}=\left(3^2\right)^9=9^9\)

\(81^{10}=\left(9^2\right)^{10}=9^{2.10}=9^{20}\)

Trả lời : 

b)

Ta có : \(5^{28}=5^{2.14}=\left(5^2\right)^{14}=25^{14}< 26^{14}\)

\(\Rightarrow5^{28}< 26^{14}\)

1) 5⁵ - 5⁴ + 5³ = 5³ . 5² - 5³ . 5 - 5³

= 5³ . ( 5² - 5 + 1 )

= 5³ . ( 25 - 5 - 1 )

= 5³ . 21

= 5³ . 3 . 7 chia hết cho 7

Vậy chứng minh 5⁵ - 5⁴ + 5³ chia hết cho7

2) 7⁶ + 7⁵ - 7⁴ = 7⁴ . 7² + 7⁴ . 7 - 7⁴

= 7⁴ . ( 7² + 7 - 1 )

= 7⁴ . ( 49 + 7 - 1 )

= 7⁴ . 55

= 7⁴ . 5 .11 chia hết cho 11

Vậy chứng minh 7⁶ + 7⁵ - 7⁴ chia hết cho 11

Tích mình nha !!!!!!!!!!!!!!!!!

\(3.\overline{abcabc}-605=3.\left(1000\overline{abc}+\overline{abc}\right)-605=3.1001.\overline{abc}-695=11\left(273\overline{abc}-55\right)⋮11\)

Đợi tý, có liền

2:

a: \(16=2^4\)

b: \(25=5^2\)

1:

a: \(4\cdot4\cdot4\cdot4\cdot4\cdot4\cdot4=4^7\)

b: \(2\cdot2\cdot2\cdot2\cdot2=2^5\)

c: \(5\cdot5\cdot5=5^3\)

bài 1:

a,4.4.4.4.4.4.4=4^7

trong đó : 4 là cơ số ; 7 là số mũ

b,2.2.2.2.2=2^5

trong đó :2 là cơ số ; 5 là số mũ

c,5.5.5=5^3

trong đó :5 là cơ số ; 3 là số mũ

bài 2:

16=2^4

25=5^2