What's the solution to the last question in the math volume 20 14 in Wuhan, Hubei? What is the solution to the last question of question 25? The main problems are 2 and 3, and there is no solution. Known straight line ABy=kx+2k+4 This problem is really troublesome and requires a lot of calculation. Many knowledge points are examined, such as solving equations, the solution of quadratic equation in one variable, the relationship between roots and coefficients of quadratic equation in one variable, Pythagorean theorem, the nature and judgment of similar triangles, the method of solving equations to find the coordinates of intersection points of two functions, and the cut-and-complement method to represent the area of triangle. Finding a breakthrough to solve the problem is the most important thing. Answer/exercise/math /799893 I hope it will help you. Haha, I hope you can adopt it. Thank you.

It is known that straight line AB:y=kx+2k+4 and parabola Y = X 2 (square) /2 intersect at point A and point B. 。

(2) When k=- 1/2, find the point p on the parabola below the straight line AB so that the area of the triangle ABP is equal to 5;

(3) If there is a fixed point D on the parabola that makes the angle ADB=90 degrees, find the maximum distance from the point D to the straight line AB.