Maths-
General
Easy

Question

If f colon R rightwards arrow R blankis defined by f open parentheses x close parentheses equals fraction numerator 1 minus x over denominator 1 plus x end fraction blank t h e n blank open parentheses f o blank f o blank f o f close parentheses open parentheses x close parentheses equals

  1. 2x    
  2. 3x    
  3. x    
  4. f open parentheses x close parentheses    

The correct answer is: x


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