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				   If a,b,c,d are in G.P. then the recipocals of (a2-b2),(b2-c2),(c2-d2) are in
(a)H.P.    (b)A.P.     (c)G.P.    (d)none


6 years ago

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										Dear harshit
a,b,c,d are in GP
b=ar
c=ar2
d=ar3
now    (a2-b2) = a2(1-r2)
(b2-c2) =  a2(1-r2)r2
(c2-d2) = a2(1-r2)r4
clearly this is in GP
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6 years ago

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