[tex] {2}^{n - 1} = 128[/tex]

Penyelesaian:

2ⁿ ⁻ ¹ = 128
2ⁿ ⁻ ¹ = 2⁷
n - 1 = 7
n = 7 + 1
n = 8

Mapel : Matematika
Bab: Eksponensial

[tex]2 ^{n - 1} = 128[/tex]
[tex]2 ^{n - 1} = 2 ^{7} [/tex]
[tex]n - 1 = 7[/tex]
[tex] n = 7 + 1[/tex]
[tex]n = 8[/tex]