Rumus suku ke-n barisan bilangan 10, 13, 16, 19, … adalah​

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Rumus suku ke-n barisan bilangan 10, 13, 16, 19, … adalah​

Jawab:

U_{n} = 3n + 7

Penjelasan dengan langkah-langkah:

Dik: 10, 13, 16, 19, ...\\Dit: U_{n}\\Jawaban:\U_{n} = a + (n-1)b = 10 + (n-1)3 = 10 + 3n - 3 = 3n + 7