Write the first five terms of each of the sequences in whose n^th terms are:

a_n = n (n + 2)

The n^th term of the sequence is given as a_n = n (n + 2)

The first five terms of the sequence will be given by substituting the value by n as 1, 2, 3, 4 and 5

The sequence so obtained now is

a₁= 1(1 + 2) = 3

a₂ = 2(2 + 2) = 8

a₃ = 3(3 + 2) = 15

a₄= 4(4 + 2) = 24

a₅= 5(5 + 2) = 35

The required first five numbers of the sequence are 3, 8, 15, 24, 35