Question

# Iff(x)=x2 - (a+b)x+ ab and A and H be the A.M and H.M between two quantities a and b, then (A) AS (A) = H (H) (B) A (H)= Hf(A) (C) A+ S(A)=H+ f(H) (D) f(A) + H=f(H) + A are arithmetic means inserted between the numbers a and b. then the value of

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