another mcq

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Joined: Aug 4, 2011

by hemangsarkar, Sep 14, 2012, 7:23 PM

Q) if $a,b,c$ are in an arithmetic progression and $a^2, b^2, c^2$ are in a harmonic progression, then -

a) $a = b = c$

b) $a, b, \frac{-c}{2}$ are in a geometric progression

c) $a , b , c$ are in a harmonic progression

d) $\frac{-a}{2}, b, c$ are in a geometric progression

solution