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

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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