Question

There are n arithmetic means between 9 and 27. If the ratio of the last mean to the first mean is 2:1, find the value of n.

Answer 1

Answer :

n=5

Solution :

Let be the arithmetic between 9 and 27. <br> Then , 9 ,, 27 are in AP. <br> 9+( n+2-1) d = 27<br><br><br>

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