nomor 8 yh.. jawab pake cara yg betul,repond .. makasi

itu jawabannyaaaa yaaaaaaaaaaaa

Un = a + (n - 1)b

U1 = a = 2

U9 = a + (9 - 1)b
26 = 2 + 8b
26 - 2 = 8b
24 = 8b
24 : 8 = b
3 = b

beda barisan = 3