1+2+3+4+.... +n=½(n+1)
Matematika
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Pertanyaan
1+2+3+4+.... +n=½(n+1)
1 Jawaban
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1. Jawaban imamjhe
Sn = n/2(a+Un)
Sn=n/2(1+n)
Sn=n/2(n+1)
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