1) If f:R-{2} → R is a function defined by f(x)=x2−4x−2 , then its range is A) R B) R-{2} C) R-{4} D) R-{-2,2} Answer: Option CExplanation: We have, f(x)=x2−4x−2 , x≠2 f(x)=(x−2)(x+2)x−2,x≠2 f(x) = (x+2) , x≠2 ∴ Range of f(x) = R-{4}