The sum of numbers in AP is and the sum of their squares is . Which of the following is the third term?
Determine the third term:
The sum of numbers of an A.P is given as .
Let us take the numbers as,
Here first term of the A.P and Common difference
So as it is given that their sum is so,
Take first term value together and common difference value together as follows:
Simplifying further we get,
So we get,
Now we have taken the third term as .
Therefore, the third term is .