4⁵⁰=  ( 4³ ) ^50/3 = 64 ^50/3

8³⁰ =( 8² ) ¹⁵ = 64¹⁵

ta có 50/3 > 15 => 4⁵⁰ > 8³⁰

\(4^{50}\)= \(\left(2^2\right)^{^{50}^{ }}\)\(=2^{100}\)

\(8^{30}=\left(2^3\right)^{30}=2^{90}\)

vì \(2^{100}>2^{90}\)nên\(4^{50}>8^{30}\)

\(333^{444}=333^{3^{111}}\) 

\(444^{333}=444^{3^{111}}\)

Vì \(444^{3^{111}}>333^{3^{111}}\)

=> \(333^{444}< 444^{333}\)

Ta có: \(333^{444}=\left(333^4\right)^{111}\)

           \(444^{333}=\left(444^3\right)^{111}\)

Vì 333⁴⁴⁴ và 444³³³ có cùng số mũ là 111. nên ta so sánh 333⁴ và 444³

333⁴=(3.111)⁴=3⁴.111⁴=81.111⁴

444³=(4.111)³=4³.111³=64.111³

Vì 81.111⁴>64.111³ => 333⁴>444³

=> 333⁴⁴⁴ > 444³³³

\(^{333^{444}>444^{333}}\)

\(8^5=\left(2^3\right)^5=2^{15}=2.2^{14}\)

\(3.4^7=3.\left(2^2\right)^7=3.2^{14}\)

Vì 2 < 3 nên 8⁵ < 3 . 4⁷

8^5<3.4^7

a) 2x . 4 = 128

2x = 128 : 4

2x = 32

x = 32 : 2

x = 16

b)x . 17 = x

=> x = 0

\(3^{20}=\left(3^2\right)^{10}=9^{10}\)

\(2^{30}=\left(2^3\right)^{10}=8^{10}\)

Ta có\(9>8\Rightarrow9^{10}>8^{10}\Rightarrow3^{20}>2^{30}\)

Vậy\(3^{20}>2^{30}\)

Chắc chắn là 3 lũy thừa  30 rồi

nhầm \(3>2\Rightarrow3^{30}>2^{30}\)

Ta có \(8^{28}=\left(2^3\right)^{28}=2^{3.28}=2^{84}\)

\(15^{21}< 16^{21}=\left(2^4\right)^{21}=2^{4.21}=2^{84}\)

Ta thấy \(2^{84}=2^{84}\)nên \(8^{28}=16^{21}\)do đó \(15^{21}< 8^{28}\)

Vậy \(15^{21}< 8^{28}\)

Ta co : \(3^{500}\&7^{300}\)

\(\Rightarrow3^{500}=\left(3^5\right)^{100}=243^{100}\)

\(\Rightarrow7^{300}=\left(7^3\right)^{100}=343^{100}\)

Ta thay \(243^{100}

3^500=(3^5)^100=243^100

7^300=(7^3)^100=343^100

3⁵⁰⁰ = 3^5.100 = ( 3⁵)¹⁰⁰ 

7³⁰⁰ = 7^3.100 = ( 7³)¹⁰⁰ 

Vì 3⁵ < 7³ nên => 3⁵⁰⁰ < 7³⁰⁰ 

Câu 1: 3^23  >    5^12

Câu 2: 3^36 < 2^8.11^4