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If the sum of the 8th & 9th terms of an arithmetic progression is 72 and the 4th term is -6. Find the common difference.​
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If the sum of the 8th & 9th terms of an arithmetic progression is 72 and the 4th term is -6. Find the common difference.​

User Glitcher
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1 Answer

4 votes

Answer:

Correct Answer: Option D

Explanation:

9 1/3

hope that helps

User Slevin
by
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