椭圆x²/8+y²/4=1与直线y=k(x-1)交于A,B,k为斜率,联立可解得X1+X2=4k²/(1+2k²),X1×X2=(2k²-8)/(1+2k²),在此基础上,怎么求 Y1+Y2,Y1×Y2?
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椭圆x²/8+y²/4=1与直线y=k(x-1)交于A,B,k为斜率,联立可解得X1+X2=4k²/(1+2k²),X1×X2=(2k²-8)/(1+
椭圆x²/8+y²/4=1与直线y=k(x-1)交于A,B,k为斜率,联立可解得X1+X2=4k²/(1+2k²),X1×X2=(2k²-8)/(1+2k²),在此基础上,怎么求 Y1+Y2,Y1×Y2?
椭圆x²/8+y²/4=1与直线y=k(x-1)交于A,B,k为斜率,联立可解得X1+X2=4k²/(1+2k²),X1×X2=(2k²-8)/(1+2k²),在此基础上,怎么求 Y1+Y2,Y1×Y2?
椭圆x²/8+y²/4=1与直线y=k(x-1)交于A,B,k为斜率,联立可解得X1+X2=4k²/(1+2k²),X1×X2=(2k²-8)/(1+2k²),在此基础上,怎么求 Y1+Y2,Y1×Y2?