April 2019 1 16 Report
Contoh : 1+2+3+4+5......+49+50
(1+50) (2+49) (3+48)
Hasilnya semua sm yaitu 51
Dari bilangan 1 sampai 50 yg apabila ditambahkan hasilnya 51 ada 25 pasang bilangan.
25x51= 1.273

Soal :
1-2+3-4+5-6+7...............-100 ?
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