In an arithmetic progression (A.P.), each term is obtained by adding a fixed constant (d) to the previous term. The common difference (d) between any two consecutive terms of an A.P. is constant.
In this A.P., the first term is -3 and the common difference is 2, since each term is obtained by adding 2 to the previous term (-3 + 2 = -1, -1 + 2 = 1, and so on).
To find the 8th term, we can use the formula:
nth term = a + (n-1)d
where nth term is the term we want to find (in this case, the 8th term), a is the first term, n is the position of the term we want to find, and d is the common difference.
Substituting the given values, we get:
8th term = -3 + (8-1)*2
8th term = -3 + 14
8th term = 11
Therefore, the 8th term of the A.P. -3, -1, 1...... is 11.