\(2^{50}=\left(2^5\right)^{10}=32^{10}\)

\(5^{20}=\left(5^2\right)^{10}=25^{10}\)

Suy ra: 2⁵⁰ > 5²⁰

b)

\(9^{200}=\left(9^2\right)^{100}=81^{100}\)

Suy ra: 99¹⁰⁰ > 81¹⁰⁰

\(5^{202}=\left(5^2\right)^{101}=25^{101}\)

\(2^{505}=\left(2^5\right)^{101}=32^{101}\)

Suy ra: 5²⁰² < 2⁵⁰⁵

so sánh

a) 99²⁰ và 9999¹⁰

Ta có: 99²⁰=(99²)¹⁰=9801¹⁰

Vì 9801<9999

=> 9801¹⁰<9999¹⁰

Vậy 99²⁰<9999¹⁰

1,10²⁰và 90¹⁰

ta có:+,10²⁰=(10²)¹⁰=100¹⁰

        +,90¹⁰=90¹⁰

vì 100¹⁰>90¹⁰=>10²⁰>90¹⁰

2,(1/16)¹⁰ và (1/2)⁵⁰

ta có:+, (1/16)¹⁰=(1/16)¹⁰

         +,(1/2)⁵⁰=(1/2⁵)¹⁰=(1/32)¹⁰

vì (1/16)¹⁰>(1/32)¹⁰=>(1/16)¹⁰>(1/2)⁵⁰

k mik nhé

\(a,\)  \(10^{20}=10^{10+10}=10^{10}.10^{10}\)

        \(90^{10}=9^{10}.10^{10}\)

  Vì \(10^{10}.10^{10}>9^{10}.10^{10}\)

    \(\Rightarrow10^{20}>90^{10}\)

Vậy \(10^{20}>90^{10}\)

\(b,\)\(\left(\frac{1}{16}\right)^{10}=\frac{1^{10}}{16^{10}}=\frac{1}{\left(4^2\right)^{10}}=\frac{1}{4^{20}}\)

   \(\left(\frac{1}{2}\right)^{50}=\frac{1^{50}}{2^{50}}=\frac{1}{\left(2^2\right)^{25}}=\frac{1}{4^{25}}\)

Vì \(\frac{1}{4^{20}}>\frac{1}{4^{25}}\)

\(\Rightarrow\left(\frac{1}{16}\right)^{10}>\left(\frac{1}{2}\right)^{50}\)

Vậy \(\left(\frac{1}{16}\right)^{10}>\left(\frac{1}{2}\right)^{50}\)

                         ~~~~~~~~~~Hok tốt~~~~~~~~~~~

Mời thí chủ nhận bài:)), sai nhớ bảo tôi thí chủ đừng giấu:))
Ta có: 9³⁰= (3²)³⁰ = 3⁶⁰

27²⁰= (3³)²⁰ = 3⁶⁰

 9³⁰ = 27²⁰

so sánh 2²¹⁰ và 5¹⁴⁰

Ta có: 2²¹⁰= (2³)⁷⁰ = 8⁷⁰

5¹⁴⁰ = (5²)⁷⁰=25⁷⁰

Mà : 8⁷⁰ < 25⁷⁰

 2²¹⁰<5¹⁴⁰

\(9^{30}=\left(3^2\right)^{30}=3^{60}\)

\(27^{20}=\left(3^3\right)^{20}=3^{60}\)

\(3^{60}=3^{60}\)⇒\(9^{30}=27^{20}\)

chỉ cần lấy máy tính thôi nhé

a,

15^12=(3*5)^12=3^12*5^12

81^3*125^5=(3^4)^3*(5^3)^5=3^12*5^15

Vì 12<15 suy ra 5^12<5^15

Suy ra 3^12*5^12<3^12*5^15

\(a.81^3.125^5=\left(3^4\right)^3.\left(5^3\right)^5=3^{12}.5^{15}=3^{12}.5^{12}.5^3=\left(3.5\right)^{12}.5^3=15^{12}.5^3>15^{12}\)

\(b.4^{20}.81^{12}=\left(2^2\right)^{20}.\left(9^2\right)^{12}=2^{40}.9^{24}=2^{20}.2^{20}.9^{20}.9^4=\left(2.9\right)^{20}.2^{20}.9^4=18^{20}.2^{20}.9^4>18^{20}\)

\(c.73^{75}=\left(73^3\right)^{25}=389017^{25}\)

\(107^{50}=107^{2.50}=\left(107^2\right)^{25}=11449^{25}\)

Vì \(389017^{25}>11449^{25}\Rightarrow73^{75}>107^{50}\)

\(2^{333}< 3^{222}\)

So sánh: 19²⁰ và 9⁸.5¹⁶

9⁸.5¹⁶=(3²)⁸.5¹⁶=3¹⁶.5¹⁶=(3.5)¹⁶=15¹⁶

Vì 19>15 và 20>16

Nên 19²⁰ > 9⁸.5¹⁶