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Three numbers form an increasing G.P. If the middle number is doubled, then the new numbers are in A.P. 

The common ratio of the G.P. is

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a
2−3
b
2+3
c
3−2
d
3+2

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detailed solution

Correct option is B

Let the three numbers be a/r, a, ar. As the numbers form  and increasing G.P., so, r>1. It is given that a/r. 2a, ar are in A.P. Hence,4a=ar+ar⇒r2−4r+1=0⇒r=2±3      =2+3 [∵r>1]


Similar Questions

Suppose a, b, c are in A.P. and a2, b2, c2, are in G.P . If a<b<c and a+b+c=32 then the value of a, is 


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