1　重、难点分析关于映射与函数的概念 ,重点是映射、函数的概念的理解与掌握 ,难点是对映射、函数概念 ,对函数符号 ｙ =ｆ(ｘ) ,以及对函数是一种特殊的映射的理解 ,对函数的定义域、值域的理解与掌握 .对于函数的单调性和奇偶性 ,重点是对函数的单调性、奇偶性的概念的理解 1 The concept of mapping and function analysis focuses on the mapping and function, the focus is the understanding and mastery of mapping, the concept of the function, the difficulty is the mapping, function concept, function symbol y = f (x), and on the function is a special The understanding of mapping, the understanding and mastery of the domain and value domain of the function. For the monotonicity and parity of the function, the emphasis is on the understanding of the concept of monotony and parity of the function.