Tuliskan empat suku pertama barisan bilangan Un=1/2(n+5)

jawab

Un = 1/2 ( n+5)

u1 = 1/2 (6) = 3
u2 = 1/2 (7) = 7/2
u3 = 1/2 (8) = 4
u4 = 1/2 (9) = 4,5
....