在《不等式》一章复习中,我选用课本习题;求。|x+1/x|≥2(x≠0)。在引导学生深入探讨时,串联基础知识、探寻解题技巧、发展思维能力,效果较好。一、复习“基础”请四位同学板书各自在学习“含有绝对值的不等式”时对此题的证明: (1)“用同号两数和的绝对值等于两数绝对值的和”与基本不等式证; (2)用x~2≥a~2(a>0)则|x|≥a证; (3)等价推证; In the review of the “Inequality” chapter, I use textbook exercises; |x+1/x|≥2(x≠0). In guiding students to in-depth discussion, the basic knowledge, problem solving skills, and development of thinking skills are effective. First, review the “basis” and ask each of the four classmates to prove the problem when they are learning “Inequalities with Absolute Values”: (1) “The absolute value of the sum of two numbers with the same number is equal to the sum of two absolute numbers.” Basic inequality certificate; (2) using x~2≥a~2(a>0) then |x|≥a certificate; (3) equivalent inference;