QUIZ #291
Diketahui barisan 2,6,9,12,15,...
Tentukan suku ke 291!
Diketahui barisan 2,6,9,12,15,...
Tentukan suku ke 291!
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✘ Diketahui:
a = 3
b = U2 - U1
= 6 - 3
= 3
✘ Ditanya:
U291?
✘ Jawab:
Un = a + (n - 1) b
U291 = 3 + (291 - 1) 3
= 3 + (290 × 3)
= 3 + 870
= 873
✘ Jadi, suku ke 291 adalah 873