解读“x±1/x=a”型条件求值题

• 作 者: 孙新东
• 出 处: 中学生数理化(初中版)
• 发表日期: 2006年02期
• 关键词: 求值 x=a 题目类型 给你 原式 己知

含有“x±(1／x)=α”型条件的求值题,形式虽然简单,但其变化非常丰富,相关的题目类型多、技巧性强．下面介绍几例,与同学们一起交流．一、将代数式用“x±(1／x)”表示

The evaluation question with “x±(1/x)=α” type condition is simple in form, but its change is very rich. There are many types of questions and skills. Here are a few examples to communicate with classmates. First, the algebraic expression with “x ± (1/x)”