Question

Tìm n thuộc N, biết:

(2n - 3)^6 = 27^4

Answer 1

(2x - 3)⁶ = 27⁴

=> (2x - 3)⁶ = (3³)⁴

=> (2x - 3)⁶ = 3¹²

=> (2x - 3)⁶ = (3²)⁶ = 9⁶

=> 2x - 3 = 9

=> 2x = 9 + 3

=> 2x = 12

=> x = 12 : 2 = 6

Vậy x = 6