Question

Jumlah bilangan ganjil antara 1 sampai 60 gimana sih caranya?

Answer 1

1-60 = 1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59
bilangan ganjil itu bilangan yg gabisa dibagi 2. jumlahnya ada 30

Answer 2

A = 3
b = 2

59 = 3 + (n - 1) 2
59 = 3 + 2n - 2
59 = 1 + 2n
58 = 2n
n = 29

S29 = 29/2 (2 × 3 + (29 - 1) 2)
= 29/2 (6 + 56)
= 29/2 (62)
= 899