AB弦长=24/7解椭圆方程x^2/4+y^2/3=1直线y=x+1斜率k=1把y=x+1代入x^2/4+y^2/3=1化简得7x^2+8x-8=0设A(x1,y1),B(x2,y2)|AB|=√[(x1-x2)^2+(y1-y2)^2].距离公式∵y1-y2=k(x1-x2)=x1-x2∴|AB|=√2*√[(x1+x2)^2-4x1x2)]...