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→ Deret Aritmatika
4, 12, 20,..., 132
a = 4
b = 12 - 4 = 8
Uₙ = 132
→ Banyak Suku barisan
Uₙ = 132
a + (n - 1)b = 132
4 + (n - 1)(8) = 132
4 + 8n - 8 = 132
8n - 4 = 132
8n = 132 + 4
8n = 136
n = 136 / 8
n = 17 ✔
Banyak Suku barisan tersebut ada 17 suku
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• Kelas : IX
• Mapel : Matematika
• Kategori : Barisan dan deret Bilangan
• Kata Kunci : -