Diketahui Un=2(n)²-2, tentukan 5 suku pertama dari rumus tersebut​

U(n) = 2n²-2 = 2(n²-1)

U(1) = 2(1²-1) = 0

U(2) = 2(2²-1) = 2.3 = 6

U(3) = 2.(3²-1) = 2.8 = 16

U(4) = 2.(4²-1) = 2.15 = 30

U(5) = 2.(5²-1) = 2.24 = 48