包邮世界数学奥林匹克经典:初三年级奥数教程

Preface 1.Quadratic Equations 2.Equations that can be Transformed into Quadratic Equations 3.Discriminant of Quadratic Equation 4.Relationship Between Roots and Coefficients and Application 5.Simultaneous Quadratic Equations with Two Unknowns 6.Integer Roots of Quadratic Equation 7.Perfect Square Numbers 8.Quadratic Functions 9.Quadratic Inequalities 10.Distribution of Roots of Quadratic Equation 11.Maximum and Minimum Values of Quadratic Functions 12.Maximum and Minimum Values of Simple Fractional Functions 13.Trigonometric Functions of Acute Angle 14.Solving Right Triangles ……