  The lowest order radiative correction to the differential cross-section of
process of muon pair production with emission of hard photon at high energy
electron-positron annihilation are calculated. Taking into account the emission
of additional soft and hard photon the cross-section can be put in the form of
Drell-Yan process in leading logarithmical approximation. Applying the crossing
transformation we obtain the cross section of radiative electron-muon
high-energy scattering process. Virtual and soft photon emission contributions
of non-leading form are tabulated for several typical kinematical points. The
limit of small invariant mass of muon pair is in agreement with our previous
analysis.
