A(x1,y1) B(x2,y2)A,B是双曲线X^2-Y^2/2=1上的两点,X1^2-Y1^2/2=1X2^2-Y2^2/2=1 相减(x1+x2)(x1-x2)-(y1+y2)(y1-y2)/2=0x1+x2=1 y1+y2=4 点M为线段AB中点,k=(y1-y2)/(x1-x2)(x1+x2)(x1-x2)-(y1+y2)(...X1+X2因该=2啊 M是AB的中点。 1=X1+X2/2公式对A(x1,y1) B(x2,y2)A，B是双曲线X^2-Y^2/2=1上的两点，X1^2-Y1^2/2=1X2^2-Y2^2/2=1 相减(x1+x2)(x1-x2)-(y1+y2)(y1-y2)/2=0x1+x2=2 y1+y2=4 点M为线段AB中点，k=(y1-y2)/(x1-x2)(x1+x2)(x1-x2)-(y1+y2)(y1-y2)/2=0变为2-4k/2=0 k=1点斜式y-2=x-1y=x+1