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Paragraph: Let f g(x)= ^2 x and g f(x)=| x| . Question: Which one of the following is g(x) ?

Options

  1. Ax
  2. B|x|
  3. Cx^2
  4. Dx|x|

Correct answer

A. x

Step-by-step solution

If f ( x )= ^2 x then g ( x )= x , so that fog (x)= ^2 x

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