If the 7th times the 7th term of an AP is equal to 11th times of 11th term then find its 15th term..

If the 7th times the 7th term of an AP is equal to 11th times of 11th

1.	If the 7th times the 7th term of an AP is equal to 11th times of 11th term then find its 15th term..
Answer» 7(a+6d)=11(a+10d)7a+42d=11a+110d 0 =11a- 7a+110d-42d 0 = 4a+ 68d 0 = 4(a+17d) 0 = a+ 17 d ( as 4 goes to LSH and 0/4=0) 0 = a18Please check question properly 7(a+6d) =11(a+10d) 7a+42d = 11a+110d0 = 11a-7a+110d-42d0 = 4a+68d-68d=4a-68d/4=a-17d=aa 18= a+17da 18=-17d+17da 18 = 0Therefore the answer is 0 and please see the question properly it\'s not 15th term it\'s 18th term