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Un = a + ( n - 1 ) b
Suku ke-n dari Deret Aritmatika
Sn = 1/2 . n ( 2a + ( n - 1 ) b)
Mapel : Matematika
Kelas : VIII
Rumus barisan aritmatika: a+(n-1)b
Rumus deret Aritmatika : 1\2 n {2a+(n-1)b}