Find the Composition $f ( x ) = \frac { 3 } { x + 5 }$

question 73

Multiple Choice

Find the composition.
-If $f ( x ) = \frac { 3 } { x + 5 }$ and $g ( x ) = \frac { 1 } { 7 x }$ , find $f [ g ( x ) ]$

• A) \(\frac { 1 x + 5 } { 21 x }\)
• B) \(\frac { 21 x } { 1 + 35 x }\)
• C) \(\frac { 3 x } { 1 + 35 x }\)
• D) \(\frac { 21 x } { 1 - 35 x }\)

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