PRE CALCULUS question please help?

given f(x) = x+1. Evaluate f (2 / x+3).

1. x-5 / x+3

2. x+5 / x+3

3. 5 / 3

4. x / x+3

2 Answers

Relevance
  • 8 years ago

    2/x+3 + 1 = (2 + x + 3)/x +3 = x + 5/x + 3

  • f(x) = x + 1

    f(2 / (x + 3)) =

    (2/(x + 3)) + 1 =

    (2/(x + 3)) + (x + 3)/(x + 3) =

    (2 + x + 3) / (x + 3) =

    (x + 5) / (x + 3)

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