Sn negatif -100 s.d -1= 100/2 ( -100 + -1) = 50 x (-101)= - 5050Sn positif 1 s.d 99= 99/2 (1+99)=99 x 50= 4950Jumlah = -5050 + 4950 = -100
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Sn negatif -100 s.d -1
= 100/2 ( -100 + -1)
= 50 x (-101)
= - 5050
Sn positif 1 s.d 99
= 99/2 (1+99)
=99 x 50
= 4950
Jumlah = -5050 + 4950 = -100