tentukan banyak suku (n), jika diketahui 2+2²+2³+.....=510

Kelas 8 Matematika
Bab Barisan dan Deret Bilangan

r = U2/U1
r = 2²/2
r = 2

Sn = 510
a . (rⁿ - 1)/(r - 1) = 510
2 . (2ⁿ - 1)/(2 - 1) = 510
2ⁿ - 1 = 510/2
2ⁿ = 255 + 1
2ⁿ = 256
2ⁿ = 2⁸
n = 8