Question

In an AP the 15th term is 12 and sum of first 11 terms is 82 1/2 (means 82 and a half).find the first term and common difference

Answer 1

Answer:

Step-by-step explanation

a + 14 d = 12  

sn = n/2 [2a+[n-- 1]d]

Answer 2

here is ur answer

a+14d=12

sn=n/2

[2a+[n-1]d]

【extra information:-i know telugu am from andhra .....】

hope it helps u dear.....