Question

The nth term of -15, -18, -21, .... is

Answer 1

Answer:

Given sequence is - 15, - 18, - 21 ...

It is clear that the above sequence is in arithmetic progression (A.P) with first term - 15 and common difference (difference between consecutive terms) is -3.

So, here first term is - 15.

Second term is -15 + (-3) = -18

Third term is - 15 + 2(-3) = - 21

Fourth term is - 15 + 3(-3) = - 24

Similarly nth term is - 15 + (n-1)(-3)

Here n represent the number of term (For ex: 7the term means n=7)