有x^2+ (√2/2 x)^2/m^2=1化简得(2m^2+1)x^2=2m^2故c^2=x^2=2m^2/(2m^2+1) (交点M的横坐标为右焦点横坐标)而c^2=a^2-b^2=1-m^2看见m^2别被吓住了令m^2=t则1-t=2t/(2t-1)解得t=-1 或 t=1/2又t=m^2>0故t=1/2故m=±√2/...