tentukan lima suku pertama dan barisan berikut A. un=n+4 b. un1/2n (n+2)

a, un = n+4
u1= 1+4 = 5
u2= 2+4 = 6
u3= 3+4 = 7
u4= 4+4 = 8
u5= 5+4 = 9

b, un = 1/2n(n+2)
u1= 1/2 . 1 (1+2) = 1,5 // 1 1/2
u2= 1/2 . 2 (2+2) = 4
u3= 1/2 . 3 (3+2) = 7,5 // 7 1/2
u4= 1/2 . 4 (4+2) = 12
u5 = 1/2 . 5 (5+2) = 17.5 // 17 1/2