Show that Equation (14.10) is the correct relativistic result for the amount of energy a...

Show that Equation (14.10) is the correct relativistic result for the amount of energy available in the center-of-mass system when the reaction m₁ + m₂ anything occurs with a bombarding particle of mass m1 and kinetic energy K on a fixed target of mass m₂. Show that it reduces in the nonrelativistic limit to Equation (13.12).