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For the Given Functions F and G , Find the Indicated

Question 485

Multiple Choice

For the given functions f and g , find the indicated composition.
- f(x) =x−1,g(x) =−7x(gf) (x) \begin{array} { l } f ( x ) = \sqrt { x - 1 } , \quad g ( x ) = - \frac { 7 } { x } \\( g f ) ( x ) \end{array}


A) −7x−1\sqrt { - \frac { 7 } { x } - 1 }

B) −17x−1- \frac { 1 } { \sqrt { 7 x - 1 } }

C) 7−x−1\frac { 7 } { \sqrt { - x - 1 } }

D) −7x−1- \frac { 7 } { \sqrt { x - 1 } }

Correct Answer:

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