tentukan suku ke-15 dari barisan bilangan 2,5,8,....

Oleh: USER8468
29 Agustus 2025 matematika 5 menit baca
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Grade: Education Mata Pelajaran: matematika
tentukan suku ke-15 dari barisan bilangan 2,5,8,....
Ditanyakan oleh:
52 Dilihat 52 Jawaban
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Jawaban (52)

Jawaban Terbaik
(79)
a=2 , b = 5-2 = 3
u15= a+(15-1)b
u15 = 2+14x3
u15 = 2+42 = 44
Dijawab pada tanggal 29 Agustus 2025
(210)
U1 = 2 = 1 x 3 - 1
U2 = 5 = 2 x 3 - 1
U3 = 8 = 3 x 3 - 1

maka,
Un = 3n - 1

U15 = 3(15) - 1 = 45 - 1 = 44

Jadi, suku ke-15 dari barisan bilangan tersebut adalah 44
Dijawab pada tanggal 29 Agustus 2025

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