c/a=根号2 c=根号2*ac^2=a^2+b^2 a^2=b^2∴a=b当焦点在x轴上时设x^2/a^2-y^2/a^2=1M代入得 a=4∴x^2/16-y^2/16=1当焦点在y轴上时设y^2/a^2-x^2/a^2=1M代入得 无解 .∴综上,x^2/16-y^2/16=1为所求你的串号我已经记下,...