M=−uv(1+Dfe)M=-\frac{u}{v}\left(1+\frac{D}{f_{e}}\right)M=−vu(1+feD)
M=−vu(1+Dfe)M=-\frac{v}{u}\left(1+\frac{D}{f_{e}}\right)M=−uv(1+feD)
M=−uv(1−Dfe)M=-\frac{u}{v}\left(1-\frac{D}{f_{e}}\right)M=−vu(1−feD)
M=+uv(1−Dfe)M=+\frac{u}{v}\left(1-\frac{D}{f_{e}}\right)M=+vu(1−feD)