If a, b, c, are in A.P and 1/a2, 1/b2, 1/c2 are in A.P, prove that -a/2, b,c are in G.P or else a=b=c

a
 
  • -11
23   a
 
  • -12
If a, b, c, are in A.P and 1/a2, 1/b2, 1/c2 are in A.P, prove that -a/2, b,c are in G.P or else a=b=c
  • -6
b-a=c-b a
  • -7
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