Presented By Presented By Harry Mills / Harry Mills / PRESENTATIONPRO PRESENTATIONPRO 第四章二次根式复习Presented By Presented By Harry Mills / Harry Mills / PRESENTATIONPRO PRESENTATIONPRO 一、二次根式的意义 二、典型例题 例1 、找出下列各根式: 中的二次根式。Presented By Presented By Harry Mills / Harry Mills / PRESENTATIONPRO PRESENTATIONPRO 例2 、x 为何值时,下列各式在实数范围内有 意义。Presented By Presented By Harry Mills / Harry Mills / PRESENTATIONPRO PRESENTATIONPRO 变式练习: 2 、已知 求 算术平方根。 1 、能使二次根式 有意义的实数 x 的值有( ) A 、0 个 B 、1 个 C 、2 个 D 、无数个 BPresente