Question

please help....
if the +ve numbers a , b, c are in AP and a^2 , b^2 , c^2 are in harmonic progression,then
a. a=b=c
b. b = 3a +c

Answer 1

AP=Arithmetic Progressoin ?

Answer 2

looks like A

Answer 3

when a=b=c: a,a,a is an arithmetic progression and a^2,a^2,a^2 is in harmonic progression (special case when all values are the same)