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U10 = a + 9b = 69
Substitusi a ke U10
6 + 9b = 69
9b = 63
b = 7
Un = a + (n-1) b
Un = 6 + (n-1) 7
Un = 7n - 1
U101 = 7(101) - 1
U101 = 707 - 1
U101 = 706