usually we say that when mass travells with very high speed it looses its mass but according 2 theory of relativityi.e

                                                      M=m/(1-v*v/c*c)

M-relative maas

m-const.mass

v-velocity of body

c-velocity of light

                                  

                                   so when body travells with speed of light M REACHES 2 infinity.here there is huge increase in mass which contradicts the above  statement .so plz explain the physics behind it