The function ​f(x)equalsRootIndex 6 StartRoot x EndRoot is​ one-to-one.
a. Find an equation for f Superscript negative 1 Baseline left parenthesis x right parenthesis​, the inverse function.
b. Verify that the equation is correct by showing that f left parenthesis f Superscript negative 1 Baseline left parenthesis x right parenthesis right parenthesisequalsx and f Superscript negative 1 Baseline left parenthesis f left parenthesis x right parenthesis right parenthesisequalsx.