Question 1195961
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(i)  In order for to write the inverse function, let's denote the resulting number by "y"


     After that, write the arithmetic and algebraic operations in reverse order,
     starting from y.


       - Multiply "y" by 2, getting 2y;

       - divide 2y by 3, getting {{{(2y)/3}}};

       - take the square root from it, getting  {{{sqrt((2y)/3)}}};

       - subtract 4 from it, getting  {{{sqrt((2y)/3)-4}}}.


     It is your inverse function  x = {{{sqrt((2y)/3)-4}}}.    <U>ANSWER</U>

     It allows you calculate the starting number x from the resulting number y.



(ii)  To determine the starting number, use this function with the value y = 50.

      You will get  x = {{{sqrt((2*50)/3)-4}}} = {{{sqrt(100/3)-4}}} = {{{10/sqrt(3)-4}}} = 1.773502692...    <U>ANSWER</U>
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Solved.