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# pre calculus question?

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

### 1 Answer

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- 8 years agoFavorite Answer
so f(x)=x+1

and it wants to find f(2/(x+3))

so basicly where ever there is a x in the original function rewrite 2/(x+3)

f(x)=x+1

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

Now it wants the function over a common denominator

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

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

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

so youre answer is 2

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