If $f ( x ) = \frac { x } { x + 6 }$ , find $f ( s - 6 )$ .
A) $f ( s - 6 ) = \frac { s - 6 } { s }$
B) $f ( s - 6 ) = \frac { s + 6 } { s + 12 }$
C) $f ( s - 6 ) = \frac { - s - 6 } { s }$
D) $f ( s - 6 ) = \frac { s + 6 } { s }$
E) $f ( s - 6 ) = \frac { s - 6 } { s + 12 }$

Question

Quizplus · Accepted Answer

Substituting $s - 6$ for $x$ in $f(x) = \frac{x}{x + 6}$, we get $f(s - 6) = \frac{s - 6}{(s - 6) + 6} = \frac{s - 6}{s}$.

If f(x)=xx+6f ( x ) = \frac { x } { x + 6 }f(x)=x+6x​

If $f ( x ) = \frac { x } { x + 6 }$