hitung S16 jika Un = 3n - 5

Kelas 8 Matematika
Bab Barisan dan Deret Bilangan

Un = 3n - 5

U1 = 3 . 1 - 5
U1 = 3 - 5
U1 = -2

U16 = 3 . 16 - 5
U16 = 48 - 5
U16 = 43

Sn = n/2 . (a + Un)
S16 = 16/2 . (-2 + 43)
S16 = 8 . 41
S16 = 328