tolong bantu cantek jawab ya kaka kaka.. h3h3 mksii
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Pertanyaan
tolong bantu cantek jawab ya kaka kaka.. h3h3 mksii
1 Jawaban
-
1. Jawaban pujinrun2000
1,3,6,10...
Un=n/2(n+1)
=20/2(20+1)
=10(21)
=210
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