CAT Quant Practice Problems

Question: Let x and y be real numbers and let f (x,y) = x + y , F(f (x,y)) = −f (x,y) and G(f (x, y)) = −F(f (x, y))

Which of the following expressions yields x2as its result?


  1. F(f (x, − x))⋅G(f (x, − x))
  2. F(f (x, x))⋅G(f (x, x))⋅ 4
  3. \({\rm{ - f}}\left( {{\rm{f}}\left( {{\rm{x,x}}} \right)} \right){\rm{.G}}\left( {{\rm{f}}\left( {{\rm{x,x}}} \right)} \right){\rm{ \div lo}}
  4. f (x, x)⋅ f (x, x)

Correct Option:3

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