Question 934843
Given: if you mean {{{f(x) = 0.3(4)x}}}, what is the value of {{{ f^-1(6)}}}?


as {{{f(x) = 0.3*4 *x}}} = > {{{f(x) =1.2x}}}
{{{f(x) =y}}}
{{{y = 1.2x}}} ...swap {{{x}}} and {{{y}}}

{{{x = 1.2y}}} ....solve for {{{y}}}

{{{y = x/1.2}}}   

{{{ f^-1(x)=x/1.2}}}

then
{{{ f^-1(6)=6/1.2}}}   

{{{ f^-1(6)=5}}}