3 1/2 , 4 1/4 , 5 , 5 3/4 Suku ke 16 adalah.... (Dengan cara)

Diket
a = 3 ½
b = 4 ¼ - 3½
= ¾

Ditanya U16?

Jawab
U16 = a + b(n - 1)
= 3½ + ¾ (16 - 1)
= 3½ + ¾ (15)
= 3½ + 45/4
= 3½ + 11¼
= 14¾