The algebrator doesn't solve word problems.

You will find the first five terms of the sequence by replacing the value for n = 1, 2, 3, 4 and 5 into 2n+8:

For n = 1 the first term is: 2n + 8 = 2*1 + 8 = 10

For n = 2 the second term is: 2n + 8 = 2*2 + 8 = 12

For n = 3 the third term is: 2n + 8 = 2*3 + 8 = 14

For n = 4 the forth term is: 2n + 8 = 2*4 + 8 = 16

For n = 5 the fifth term is: 2n + 8 = 2*5 + 8 = 18

The first five terms of the sequence are: 10, 12, 14, 16 and 18.