Diket
U1 (a) = 2
beda (b) = U2 - U1 = 9 - 2 = 7
Ditanya = Rumus suku ke-n..?
Jawab
Un = a + (n - 1)b
Un = 2 + (n - 1)7
Un = 2 + 7n - 7
Un = -5 + 7n
semoga membantu
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Diket
U1 (a) = 2
beda (b) = U2 - U1 = 9 - 2 = 7
Ditanya = Rumus suku ke-n..?
Jawab
Un = a + (n - 1)b
Un = 2 + (n - 1)7
Un = 2 + 7n - 7
Un = -5 + 7n
semoga membantu