Barisan, Deret Aritmatika dan Geometri

1. Barisan dan Deret Aritmatika
* Rumus suku ke-n
Un = a + (n-1) b
* Rumus jumlah suku ke-n
Sn = ½n (a+Un)
Sn = ½n (2a + (n-1)b)

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