hasil dari 2+4+6+8+10+......+100

A = 2
B = 4-2
Banyak suku :
= 100/2
= 50

S50 :
= n/2 (a + Un)
= 50/2 (2 + 100)
= 25 x 102
= 2550

Bab Pola Bilangan
Matematika SMP Kelas VII

2 + 4 + 6 + ... + 98 + 100 = 
2 + 100 = 102
4 + 98 = 102
6 + 96 = 102
8 + 94 = 102
10 + 92 = 102
------------------------- +
                510

12 sampai 90 = 510
22 sampai 80 = 510
32 sampai  70 = 510
42 sampai 60 = 510

5 x 510 = 2.550