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Insert 3 arithmetic means between 5 and 21.

Asked by Topperlearning User 22nd November 2017, 10:01 AM
Answered by Expert
Answer:

After inserting the 3 arithmetic means between 5 and 21 the resulting sequence will be an AP with common difference d.

begin mathsize 12px style 5 comma space straight A subscript 1 comma straight A subscript 2 comma straight A subscript 3 comma 21
5 to the power of th space term space equals space 21
5 plus 4 straight d equals 21
4 straight d equals 16
straight d equals 4 end style

First AM is 5+4=9

Second AM is 5+2(4)=13

Third AM is 5+3(4)=17

So the resulting sequence is 5,9,13,17,21

Answered by Expert 22nd November 2017, 12:01 PM
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