# Please explain this method to solve series?

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**Note:- I can do this question with another method but i want to know about this method. But I am not able to understand from E.Q-(1) so please explain this method & there is no need to solve question .**

PLEASE EXPLAIN.

*Thanks in advance!!*

**Note:- I can do this question with another method but i want to know about this method. But I am not able to understand from E.Q-(1) so please explain this method & there is no need to solve question .**

PLEASE EXPLAIN.

*Thanks in advance!!*

##### 1 Answer

Aug 8, 2018

Please see the **Explanation.**

#### Explanation:

As per eqn.(1),

Now, we want to express

So, let us see if we succeed if we take

Thus, we have been successful to express