2 29. The 4th term of an AP is 11. The sum of the 5th and 7th terms – InterviewSolution

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1.	2 29. The 4th term of an AP is 11. The sum of the 5th and 7th terms of this APis 34. Find its common difference.[CBSE 2015]
Answer» TION:T 4 =11T 5 +T 7 =34a+3d=11,a+4d+a+6d=342a+10d=34a+5d=17⇒(a+5d)−(a+3d)=17−11⇒2d=6⇒d=3.

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