Current location - Training Enrollment Network - Mathematics courses - Elective course 2- 1 Mathematical Parabolic Geometry Example 5 Is there any other solution?
Elective course 2- 1 Mathematical Parabolic Geometry Example 5 Is there any other solution?
Let the intersection be A(x 1, y 1), B(x2, y2) x+b = x 2/2x 2-2x-2b = 0, △ > 0, b >-1/2x1+x2 = =AB? x 1? +y 1? +x2? +y2? =(x 1-x2)? +(y 1-y2)? x 1? +(x 1+b)? +x2? +(x2+b)? =(x 1-x2)? +(x 1-x2)? x 1? +x 1? +b? +2x 1b+x2? +x2? +b? +2x2b=2x 1? +2x2? +2b(x 1+x2)+2b? =2x 1? +2x2? -4x 1x22b(x 1+x2)+2b? =-4x 1x24b+2b? = 8bb = 0 or 2