左焦点(-1,0)倾斜角为π/4的直线斜率=tanπ/4=1∴直线解析式y=x+1代入x^2/3+y^2/2=1得5x^2+6x-3=0x1+x2=-6/5x1x2=-3/5根据弦长公式=√{(1+k^2)[(x1+x2)^2-4x1x2]}=√[2*(36/25+12/5)]=8√2/5中点M横坐标=(x1+x2)/2=-...