Question 399995
{{{f(x)=x+9}}}
{{{f^(-1)(y)=y-9}}} (How to find this - let write function f(x)=x+9 in this way y=x+9, if you solve this for x you'll receive x=y-9 this is {{{f^(-1)(y)}}})
so {{{f^(-1)(5)=5-9=-4}}}