// Example  2.10

                     //  Rx=R+(R||2Rx)
                     //  i.e  2*Rx^2-3R Rx-R^2 =0
R=1;
Rx={3*R+sqrt(9*R*R+8*R*R)}/4;    // Using Roots of codratic Equation

disp(' Equivalent R is = '+string(Rx)+' R');





               // p 26     2.10