Question

2ⁿ.2³=64(bằng 3 cách)

Answer 1

C1: 2ⁿ.8 = 64 => 2ⁿ = 64 : 8 = 8 = 2³ => n = 3

C2: 2ⁿ⁺³ = 2⁶ => n + 3 = 6 => n = 6 - 3 = 3

C3: 2³ = 2⁶ : 2ⁿ = > 2³ = 2^6-n => 3 = 6 - n => n = 6 - 3 = 3

Answer 2

C1: 2^n. 2^3 = 64 => 2^n.8 = 64 => 2^n = 8 => 2^n = 2^3 => n = 3

C2 : 2^n . 2^3 = 64 => 2^n+3 = 2^6 => n + 3 = 6 => n = 3

C3 : 2^n.2^3 = 64

      2^n        = 2^6 : 2^3

      2^n         = 2^3

        n = 3

Answer 3

Cách 1: 2ⁿ.2³ = 64 => 2^{n + 3} = 2⁶ => n + 3 = 6 => n = 3

Cách 2: 2ⁿ.2³ = 64 => 2ⁿ = 64 : 2³ = 2⁶ : 2³ = 2³ => n = 3

Cách 3: 2ⁿ.2³ = 64 => 2ⁿ = 64 : 2³ = 64 : 8 = 8 = 2³ => n = 3