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Dengan demikian, suku ke-10 adalah U(10) = a + 9b = 2 + 9 x 9 = 83.
Oleh karena U(n) = a + (n - 1)b, maka
U(n) = 2 + (n - 1) x 9 = 2 + 9n - 9 = 9n - 7.
Semoga membantu :)