co: 2^91 = (2^13) ^7

5^35 = (5^5)^7

suy ra 2 mu 91 lon hon 5 mu 35

Ta có:\(2^{91}=2^{13.7}=\left(2^{13}\right)^7=8192^7\)
\(5^{35}=5^{5.7}=\left(5^5\right)^7=3125^7\)
Vì 8192 > 3125 nên \(2^{91}>5^{25}\)

2⁹¹=(2¹³)⁷=8192⁷

5³⁵=(5⁵)7=3125⁷

Vì 8192>3125 nên 8192⁷>3125⁷ hay 2⁹¹>5³⁵

2^91>5^35 nha bạn

Ta có : 2⁹¹ = 2^13.7 = (2¹³)⁷ = 8192⁷

            5³⁵ = 5^5.7 = (5⁵)⁷ = 3125⁷

Vì 8192 > 3125 nên 8192⁷ > 3125⁷ nên  2⁹¹ > 5³⁵

2⁹¹=(2¹³)⁷=8192⁷

5³⁵=(5⁵)⁷=3125⁷

vì 8192⁷>3125⁷nên 2¹⁹>5³⁵

chúc bạn học tốt!!!

\(2^{91}=\left(1.2\right)^{91}=1^{182}\)

\(5^{35}=\left(1.5\right)^{35}=1^{175}\)

Vù 182 lớn hơn 175 nên \(1^{182}>1^{175}\)

Vậy \(2^{91}>5^{35}\)

2^24 = (2^3)^8 = 8^8

3^16 = (3^2)^8 = 9^8

Vì 8^8 < 9^8 => 2^24 < 3^16

99^20 = 99^10 . 99^10 < 99^10 . 101^110 = (99.101)^10 = 9999^10

=> 99^20 < 9999^10

2^91 = (2^13)^7 = 8192^7

5^35 = (5^5)^7 = 3125^7

Vì 8192^7 > 3125^7 => 2^91 > 5^35

k mk nha

\(2^{91}\)=2,475880079_x10²⁷

\(5^{35}\)=2,910383046_x10²⁴

Vay \(2^{91}\)>\(5^{35}\)

ta có:2^91>2^90 , 2^90=2^5^18=32^18

5^35<5^36 , 5^36=5^2^18=25^18

vì 32^18>25^18

=>2^91 > 5^35

Bài 1:2^91=(2^13)^7=8192^7

5^35=(5^5)^7=3125^7

Mà 8192>3125=>8192^7>3125^7

=>2^91>5^35

Bài 2:5^x+2 = 5⁴

=> x+2 = 4

x = 4-2

x = 2