Diketahui barisan geometeri 256, 128, 64. Tentukan suku ke 11... Tolong ya

Kelas 8 Matematika
Bab Barisan dan Deret Bilangan

r = U2/U1
r = 128/256
r = 1/2

U11 = a . r¹⁰
U11 = 256 . (1/2)¹⁰
U11 = 256 . 1/1.024
U11 = 1/4

a = 256
U₂ = 128



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Dan,
U₁₁ = 2⁹⁻¹¹
= 2⁻²
= ¼