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= 3(4) - 1
= 12 - 1
= 11
amak
U1 = 3 x 1 - 1 = 3 -1 = 2
U2 = 3 x 2 - 1 = 6 -1 = 5
U3 = 3 x 3 - 1 = 9 -1 = 8
U4 = 3 x 4 - 1 = 12 -1 = 11
Jadi 4 suku pertamanya yaitu 2,5,8, dan 11