carilah lima suku dari barisan A) Un=n(n+1) B) Un=1/n(n+3) C) Un=n*2/n+1

A) Un = n(n+1)
U1 = 1(1+1) = 2
U2 = 2(2+1) = 6
U3 = 3(3+1) = 12
U4 = 4(4+1) = 20
U5 = 5(5+1) = 30

B) Un = (n+3)/n
U1 = (1+3)/1 = 4
U2 = (2+3)/2 = 5/2
U3 = (3+3)/3 = 2
U4 = (4+3)/4 = 7/4
U5 = (5+3)/5 = 8/5

C) soalnya kurang jelas tanda operasi nya, sya bingung. maaf