Questions
Three positive numbers form an increas-ing G.P. If the middle term in this G.P. is tripled, the new numbers are in A.P. Then the common ratio of G.P.is:
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a
3+22
b
22-3
c
2+23
d
22+3
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Correct option is A
Let the three positive numbers in the increas-ing G.P. bear,a,ar where r>1We are given, ar , 3a, ar are in A.P. ∴ ar+ar=2(3a)⇒ r2−6r+1=0⇒ r=3±22As r>1, r=3+22Similar Questions
If the roots of the equation,
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