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Bbhzvxmzjbx x hxbz xhbs xhzbz xhgxxsnh cugdjfn fhcj fbfbcd udhhdjbfun fbf fidb xubxx jx jxifncb ks ai ajsn ssbjsnjjs jsn bsj sbs sbsi js sj isbsbsbbs sbsoBab Barisan dan Deret Bilangan
Sn = 3n² + n
Suku pertama = U1 = S1
S1 = 3 . 1² + 1
S1 = 3 + 1
S1 = 4