For the function $f ( x ) = \frac { k } { x - 3 } + 1$, when $f ^ { - 1 } ( 7 ) = 4$, what is the value of the constant $k$? (Note: $k \neq 0$) [3 points] (1) 2 (2) 4 (3) 6 (4) 8 (5) 10
For the function $f ( x ) = \frac { k } { x - 3 } + 1$, when $f ^ { - 1 } ( 7 ) = 4$, what is the value of the constant $k$? (Note: $k \neq 0$) [3 points]\\
(1) 2\\
(2) 4\\
(3) 6\\
(4) 8\\
(5) 10