Find F - -1 ( X ) $f ( x ) = x ^ { 2 } + 7 \text { for } x \geq 0$

Multiple Choice

Find f - -1 ( x ) . $f ( x ) = x ^ { 2 } + 7 \text { for } x \geq 0$

A) $f ^ { - 1 } ( x ) = \sqrt { x + 7 }$
B) $f ^ { - 1 } ( x ) = \sqrt { x - 7 }$
C) $f ^ { - 1 } ( x ) = x - 7$