Math Chapter Wise Sequences And Series (A.p., G.p., H.p.) English MCQ UP TGT 2021 UP PGT 2013 Q.If (b – c)2, (c – a)2, (a – b)2 are in A.P., then 1 1 1,, b – c c – a a – b will be in AH.P. BG.P. CA.P. DNone of the above Show answer Correct answer: A.P.