函数是高考数学中极为重要的内容,函数的观点和方法既贯穿了高中代数的全过程,又是学习高等数学的基础。纵观近年来的高考试题,函数在选择、填空、解答三种题型中每年都有试题,其考点主要体现在以下几个方面:一纯粹函数内容(即单调性、奇偶性、定义域、值域、反函数)及映射概念的考查,常以选择题、填空题出现,其能力要求比较低例1,(2011安徽)设f(x)是定义在R上的奇函数,当x≤0时,f(x)=2x2-x,则f(1)=。A.-3 B.-1 C.1 D.3 Function is an extremely important content in college entrance examination mathematics. The viewpoints and methods of functions not only penetrate the whole process of high school algebra, but also form the basis for learning advanced mathematics. Looking at the high exam questions in recent years, the function has questions in each of the three questions: selecting, filling in the blank, and answering questions. Its test points are mainly reflected in the following aspects: a pure function content (ie monotony, parity, domain, The value range, inverse function, and mapping concepts are often examined by multiple-choice and blank-filling questions. Their capacity requirements are relatively low. Example 1 (2011 Anhui) Let f(x) be an odd function defined on R, when x≤ At 0, f(x)=2x2-x, then f(1)=. A.-3 B.-1 C.1 D.3