# Arithmetic Progressions

#### Answer:

In the given problem, we need to find the number of terms in an A.P

(i) 25, 50, 75, 100 …

We are given,

Let us take the total number of terms as *n*.

So,

First term (*a*) = 25

Last term (*a*_{n}) = 1000

Common difference (*d*) =

Now, as we know,

So, for the last term,

Therefore, the total number of terms of the given A.P. is.

(ii) -1, -3, -5, -7 …

We are g…

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