Question

in an A.P of 50 terms the sum of first 10 terms is 210 and sum of its last 15 terms is 2565. find the A.P
STEP BY STEP PLEASE​

Answer 1

Step-by-step explanation:

 know that this sum is equal to 2565. Thus, we have 15(a+42d)=2565. Simplifying the above equation, we have a+42d=256515=171

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