A.P., G.P. n H.P.

VITEEE 2015 Papers › Algebra questions › A.P., G.P. n H.P.

If the first and the (2n-1)the terms of an A.P. , G.P. and H.P. are equal an their nth terms are a, b, c respectively, then
(a) a=b=c
(b) aâ‰¥bâ‰¥c
(c) a+c=b
(d) ac-b² = 0

#Mathematics #Algebra

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2 Answers

Dr.House ·2010-07-13 08:32:16

http://www.transtutors.com/forums/Mathematics/9/4569/AP,-GP--HP.htm

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Lokesh Verma ·2010-07-13 08:50:27

The best thing here would be to say that

2a=F+L
b²=FL
c=2FL/(F+L)

Hence a>=b>=c because AM >= GM >= HM..

Hence option b..

Think why what I have written is corrrect?

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A.P., G.P. n H.P.

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