Question

Jumlah bilangan kelipatan 6 antara 100 dan 3000 adalah...

Answer 1

Banyak bilangan kelipatan 6 antara 100-3000 ada:

(2999-101) : 6
= 2898 : 6
= 483 bilangan.

Answer 2

N = (3000/6 -1) - 100/6 = 500-1 - 16 = 483

a = 102
b = 6
Un = a+(n-1)b
= 102 + (483-1)6
= 102 + 2892
= 2994

Sn = n/2 (a+Un)
=483/2 (6+2994)
= 483/2 x 3000
= 724500

*cmiiw