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1)

If f:R-{2} → R is  a function defined by  f(x)=x24x2 , then its range is


A) R

B) R-{2}

C) R-{4}

D) R-{-2,2}

Answer:

Option C

Explanation:

 We have,

f(x)=x24x2  , x≠2

f(x)=(x2)(x+2)x2,x2

 f(x) = (x+2)   , x2

   Range of f(x) = R-{4}