Qz - Barisan Aritmatika
a = 12
b = 3
U₂₁ = ....
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a = 12
b = 3
U₂₁ = ....
⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔
Penjelasan dengan langkah-langkah:
Un = a + (n - 1)b
U21 = 12 + (21 - 1)3
U21 = 12 + 20·3
U21 = 12 + 60
U21 = 72
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__Aritmatika__
= Rumus
Un = a + (n - 1)b
U₂₁ = 12 + (21 - 1).3
U₂₁ = 12 + 20.3
U₂₁ = 12 + 60
U₂₁ = 72
Jadi U₂₁ = 72
Catatan!
- Un = a + (n - 1) b
- a = Suku Pertama
- b = Beda
- n = Banyaknya Suku
