JEE Main 2003Annual, Paper 1MathematicsMediumLimit, Continuity and Differentiability420× since 2002Let f(x)f\left( x \right)f(x) be a polynomial function of second degree. If f(1)=f(−1)f\left( 1 \right) = f\left( { - 1} \right)f(1)=f(−1) and a,b,ca,b,ca,b,c are in A.P,A.P,A.P, then f′(a),f′(b),f′(c)f'\left( a \right),f'\left( b \right),f'\left( c \right)f′(a),f′(b),f′(c) are inAOption A. Arithmetic -Geometric ProgressionBOption B. A.PA.PA.PCOption C. G.PG.PG.PDOption D. H.PH.PH.PCheckSkip · show solution