Question

Tìm x biết : 2^3x+2  = 4^{x + 5}

3^{2x -1} = 243

(2 x-1)³ = 27

GIÚP MÍNH VỚI 

Answer 1

3^{2x -1} = 243

3^{2x -1} = 3⁵

2x-1=5

2x=5+1

2x=6

x=6:2

x=3

(2 x-1)³ = 27

(2 x-1)³ =3³

2x-1=3

2x=3+1

2x=4

x=4:2

x=2

Answer 2

(2x-1)³= 27

(2x-1)³⁼3³

2x-1=3

2x=3+1

2x=4

x=4:2

x=2

Ok, xong!!!

Answer 3

3x = 1/243