tentukan hasil dari , tanpa menghitung satu per satu -100-99-98.....-2-1-0+1+2...+48+49+50

A = -100
B = -99 - (-100) = 1

Jumlah suku :
= 100 + 1 + 50
= 151

S151 :
= n/2 x [2a + (n-1) x b]
= 151/2 x [2 x (-100) + (151-1) x 1]
= 75,5 x [-200 + 150]
= 75,5 x (-50)
= -3.775

(-101×100)/2 +(50×51)/2
= (-101×50) + (50×51)
=-5050 + 1285
= -3775
Maaf kalo salah