In an A.P., the sum of the first 10 terms is 150, and the sum of | Filo
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In an A.P., the sum of the first 10 terms is 150, and the sum of the next 10 terms is 550. Find the A.P.

Solution:
From the question it is given that, 
The sum of the first 10 terms
The sum of the next 10 terms
A.P
We know that,
Then,

Now, multiplying equation(i) by 2 we get,
Subtract equation (iii) from equation (ii),

Substitute the value of d in equation (i) we get,
Therefore, A.P. is 3, -1, -5, -9, …
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