Question

高二数学题,求数学帝,要求过程详细

Answer 1

①离心率=√(a^2-b^2)/a =√2/2, a^2=2b^2,a =√2b; F(c, 0) ->(√(a^2-b^2), 0)->(b,0), M(0, b),MF =(b, -b), FB = (a-b,0);MF乘FB=b(a-b=√2-1 b=1,a=√2, x^2/2+y^2=1

②L: y=x+m, m=1, m=-4/3详情另发