8,17,26,35, tentukan suku ke-12

8 , 17 , 26 , 35
a = 8
b = 17 – 8 = 9

U12 = a + (n – 1)b
U12 = 8 + (12 – 1) 9
U12 = 8 + 99
U12 = 107

U12=a+(12-1)xb
8+(12-1)x9
8+11×9
8+99
U12=107

maaf kalo salah