Tolong dijawab sama diberi cara nya
terimakasih
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a(suku pertama) = 5
b(beda) = +5
c(beda (2)) = +2
Un = a+(n-1)b + (n-1) (n-2) c ÷ 2
= 5+(50-1)5+(50-1)(50-2)2 ÷ 2
= 5 + 49×5+ 49×48×2÷2
= 5+245+2352
=2602 (C)