ON THE EXTENSION OF THE ERD?S-MORDELL TYPE INEQUALITIES

摘要

We discuss the extension of inequality R_A ≥ c/ar_b + b/ar_c to the plane of triangle △ABC. Based on the obtained extension, in regard to all three vertices of the triangle, we get the extension of Erd?s-Mordell inequality, and some inequalities of Erd?s-Mordell type.