Question

Jumlah bilangan kelipatan 4 dan 6 antara 300 dan 600 sama caranya ya kak​

Answer 1

4 . 6 = 24

324, 348, 372, ..., 576

Un = 576

a + (n - 1) . b = 576

324 + (n - 1) . 24 = 576

(n - 1) . 24 = 576 - 324

n - 1 = 252/24

n = 10,5 + 1

n = 11,5

Sn = n/2 . (a + Un)

S24 = 11,5/2 . (324 + 576)

S24 = 5,75 . 900

S24 = 5,175