Page 9 - Slide 1

SUKU PERTAMA, BEDA, DAN SUKU KE-N

BARISAN ARITMATIKA

Beda (b) Suku ke-n (U )
n
3 – 1 = 2 a = 1

5 – 3 = 2 U = 1 + 2
2
7 – 5 = 2 U = 1 + 2+2
3
9 – 7 = 2 U = 1 + 2+2+2
4
Jadi U = 1 + 2+2+2+2
5
b = U - U n-1 Jadi
n
U = a + (n-1)b
n