tuliskan suku ke 8 dari barisan berikut a.5, 9, 13, 17 b.10, 7, 4, 1

BARISAN ARITMETIKA

a. 5, 9, 13, 17
a = 5
b = U2 - U1
= 9 - 5
= 4

U8 = a + (8-1) × b
= 5 + 7 × 4
= 5 + 28
= 33

b. 10, 7, 4, 1
a = 10
b = U2 - U1
= 7 - 10
= -3

U8 = a + (8-1) × b
= 10 + 7 × (-3)
= 10 + (-21)
= 10 - 21
= -11

Semoga bermanfaat \^_^/