How about we take
![\[a\text{ }and\text{ }d\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-9c94af1d8caa228a784d71e27a045649_l3.png "Rendered by QuickLaTeX.com")
to be the initial term and the normal contrast of the A.P. separately.
Then, at that point, it given that
Along these lines, the amount of
![\[\left( p\text{ }+\text{ }q \right)\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-c8adf8a7f121183e04de933de35f17b3_l3.png "Rendered by QuickLaTeX.com")
terms of the A.P. is
![\[0.\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-4fb40a11af7a5f71c0a616a5485d4410_l3.png "Rendered by QuickLaTeX.com")
If the sum of first p terms of an A.P. is equal to the sum of the first q terms, then find the sum of the first (p + q) terms.
If the sum of first p terms of an A.P. is equal to the sum of the first q terms, then find the sum of the first (p + q) terms.