This topic examines the application of undetermined coefficient method to find resolution function, the application of similar triangles property, the judgment and property of diamond, the application of rotation property, and the application of classified discussion thought. The application of triangle area relation is the key to solving problems. The answer to this question is here/exercise/math /79958 1. Don't forget to take my answer, dear, by visual inspection.

As shown in the figure, the image of quADratic function y=ax square +bx(a is not equal to 0) passes through point A( 1, 4), the symmetry axis is straight line x=-3/2, the line segment ad is parallel to the X axis, and the parabola intersects with point D. Take point c (0,2) on the Y axis, and the straight line AC intersects with the parabola at point b to connect OA and OB.