jumlah nilai bilangan ganjil antara 100 dan 200

101,103,105,107,109

SEMOGA BERMANFAAT

Awal = 101
beda = 2
Un = 199

Un = a + (n - 1)b
199 = 101 + (n - 1)2
199 - 101 = 2n - 2
98 = 2n - 2
98 + 2= 2n
2n = 100
n = 100/2
n = 50

Sn = n/2 (a + Un)
= 50/2 (101 + 199)
= 25 (300)
= 7500