Pada barisan aritmetika 2, 8, 14, 20….

Jawaban:

Barisan Aritmatika

a = 2

b = 8 – 2 = 6

.

Un = a + (n – 1) × b

146 = 2 + (n – 1) × 6

146 = 2 + 6n – 6

146 = 6n – 4

6n = 146 + 4

6n = 150

n = 150/6

n = 25