UN = 3 n + 8
U1 = 3(1) + 8 = 11
U2 = 3(2) + 8 = 14
U3 = 3(3) + 8 = 17
U4 = 3(4) + 8 = 20
a. barisan aritmatika adalah 11, 14, 17, 20, ...
b. Suku pertama 11 dan bedanya 14-11 = 3
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UN = 3 n + 8
U1 = 3(1) + 8 = 11
U2 = 3(2) + 8 = 14
U3 = 3(3) + 8 = 17
U4 = 3(4) + 8 = 20
a. barisan aritmatika adalah 11, 14, 17, 20, ...
b. Suku pertama 11 dan bedanya 14-11 = 3