Find the Inverse Function of F Informally $f ^ { - 1 } ( x ) = 4 \sqrt { x }$

Multiple Choice

Find the inverse function of f informally.
F(x) = x⁴

A) $f ^ { - 1 } ( x ) = 4 \sqrt { x }$
B) $f ^ { - 1 } ( x ) = \sqrt [ 4 ] { x }$
C) $f ^ { - 1 } ( x ) = \frac { 1 } { \sqrt [ 4 ] { x } }$
D) $f ^ { - 1 } ( x ) = ( \sqrt [ 4 ] { x } ) ^ { 4 }$
E) $f ^ { - 1 } ( x ) = - \sqrt [ 4 ] { x }$