a)\(\left(\frac{1}{5}\right)^{10}.5^{20}=\left(\frac{1}{5}\right)^{10}.5^{10.2}=\left(\frac{1}{5}\right)^{10}.25^{10}=\left(\frac{1}{5}.5\right)^{10}=1^{10}=1\)

b)\(5^2.3^5.\left(\frac{3}{5}\right)^2=\left(\frac{3}{5}.5\right)^2.3^5=3^2.3^5=3^7\)

c)\(\left(\frac{1}{16}\right)^3:\left(\frac{1}{8}\right)^2=\left(\frac{1}{8}\right)^{2.3}:\left(\frac{1}{8}\right)^2=\left(\frac{1}{8}\right)^{6+2}=\left(\frac{1}{8}\right)^8\)

\(a.\left(\frac{1}{5}\right)^{10}.5^{20}=\left(\frac{1}{5}\right)^{10}.5^{10.2}=\left(\frac{1}{5}\right)^{10}.\left(5^2\right)^{10}=\left(\frac{1}{5}\right)^{10}.25^{10}=\left(\frac{1}{5}.25\right)^{10}=5^{10}.\)

\(b.5^2.3^5.\left(\frac{3}{5}\right)^2=\left[5^2.\left(\frac{3}{5}\right)^2\right].3^5=\left(5.\frac{3}{5}\right)^2.3^5=3^2.3^5=3^7\)\(c.\left(\frac{1}{16}\right)^3:\left(\frac{1}{8}\right)^2=\left[\left(\frac{1}{4}\right)^2\right]^3:\left[\left(\frac{1}{2}\right)^3\right]^2=\left(\frac{1}{4}\right)^6:\left(\frac{1}{2}\right)^6=\left(\frac{1}{4}:\frac{1}{2}\right)^6=\left(\frac{1}{2}\right)^6\)

1)5^x+1 + 6.5^x+1 = 875

   5^x+1 ( 1+6 ) = 875

   5^x+1 . 7 = 875

5^x+1 = 875 : 7

5^x+1 = 125

5^x+1 = 5³

x+1 = 3

x = 3 - 1

x = 2

2)3^x+1 + 3^x+3 = 810

  3^x . 3 + 3² . 3^x+1 = 810

  3^x . 3 + 9 . 3^x . 3 = 810

  3^x .3 ( 1 + 9 ) = 810

  3^x+1 . 10 = 810

  3^x+1 = 810 : 10

  3^x+1 = 81

  3^x+1 = 3⁴ 

x+1 = 4

x = 4-1

x = 3

a,\(2^4\cdot3^5:6^4\)

\(=\frac{2^4\cdot3^6}{\left(2\cdot3\right)^4}\)

\(=\frac{2^4\cdot3^6}{2^4\cdot3^4}\)

\(=3^2\)

Bài 2

\(a,5^3\cdot8=5^3\cdot2^3=10^3=1000\)

\(b,2^5-2019^0=32-1=31\)

\(c,3^3+2^5-1^{10}=27+32-1=58\).

\(d,9^2\cdot33-81\cdot23+5^2=81\cdot33-81\cdot23+25\)

\(=81\cdot\left(33-23\right)+25\)

\(=810+25=835\)

\(g,\left[2^2+6^2\right]:5+11^2\)

\(=\left[4+36\right]:5+121\)

\(=40:5+121=8+121\)

\(=129\)

\(d,\frac{14\cdot3^{10}-5\cdot3^{10}}{3^{12}}\)

\(=\frac{3^{10}\cdot\left(14-5\right)}{3^{12}}\)

\(=\frac{3^{10}\cdot9}{3^{12}}\)

\(=\frac{3^{10}\cdot3^2}{3^{12}}=\frac{3^{12}}{3^{12}}\)

\(=1\)

còn bài 1 nưa mà bạn

b.Ta có :  = (111.3)^111.4 = ( 111⁴ . 3⁴ )¹¹¹= 

            = ( 111 . 4 )^111.3 = ( 111³.4³)111 = 

Vì (111⁴.81)¹¹¹ > ( 111³.64 )¹¹¹ => 333⁴⁴⁴ > 444³³³

a. 10³⁰ = ( 10³ )¹⁰=1000¹⁰

2¹⁰⁰ = ( 2¹⁰ )¹⁰=1024¹⁰

Vì 1000¹⁰<1024¹⁰ nên 10³⁰<2¹⁰⁰

Bạn gì ơi, bạn làm đầy đủ  ra được không ?

\(10^{30}=\left(10^3\right)^{10}=1000^{10}\)

\(4^{50}=\left(4^5\right)^{10}=1024^{10}\)

Vì \(1000^{10}< 1024^{10}\)nên \(10^{30}< 4^{50}\)

10³⁰  = (2.5)³⁰ =2³⁰ . 5.³⁰

4⁵⁰ = 2 ⁵⁰.2⁵⁰= 2³⁰ . 2⁷⁰

Vi 2³⁰ =2³⁰ nen minh can so sanh 5³⁰ va 2⁷⁰

5³⁰= (5³)¹⁰=125¹⁰

2⁷⁰= (2⁷)¹⁰=128¹⁰

Vi 125¹⁰<128¹⁰ nen 4⁵⁰ >10³⁰

^{Khong co dau xin loi nhe !}

thank you

các bạn

Nhu lon

a) 5.4² - 18 : 3² = 5.16 - 18 : 9 = 80 - 2 = 78

b) 3³.18 - 3³.12 = 3³(18 - 12) = 3³.6 = 27.6 = 162

c) 39.213 + 87.39 = 39.(213 + 87) = 39.300 = 11700

d) 80 - [130 - (12 - 4² )] = 80 - (130 - 12 + 4²) = 80 - 130 + 12 - 4² = -50 - 4 = -54

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