函數(shù)單調(diào)性習題大全,推薦文檔

1、一、選擇題函數(shù)的單調(diào)性1. 下列函數(shù)中,在區(qū)間上為增函數(shù)的是().abcd 2函數(shù)的增區(qū)間是（）。abcd3. 在上是減函數(shù)，則 a 的取值范圍是（ ）。a. bcd4. 當時，函數(shù)的值有正也有負，則實數(shù) a 的取值范圍是（）a. bcd5. 若函數(shù) f (x) 在區(qū)間（a，b）上為增函數(shù)，在區(qū)間（b，c）上也是增函數(shù)，則函數(shù) f (x)在區(qū)間（a，c）上（）（a）必是增函數(shù)（b）必是減函數(shù)（c）是增函數(shù)或是減函數(shù)（d）無法確定增減性6. 設(shè)偶函數(shù) f (x) 的定義域為 r ，當 x 0,+)時， f (x) 是增函數(shù)，則 f (-2),f (p)，f (-3) 的大小關(guān)系是 （）a f (

2、p)f (-3) f (-2)b f (p)f (-2) f (-3)c f (p) f (-3) f (-2)df (p) f (-2) f (-3)17. 已知偶函數(shù) f (x) 在區(qū)間0, +) 單調(diào)遞增，則滿足 f (2x -1) f ( ) 的 x 取值范圍是12a（ ，）b（ - ， 21）c（2 2， ）d3,+33323 38. 已知定義域為(1，1)的奇函數(shù) y=f(x)又是減函數(shù)，且 f(a3)+f(9a2) 1是 r 上的減函數(shù)，那么 a 的取值范圍是（）a. (0,1)b. (0, )3c. , ) 7 3d. ,1)7f(x1)f(x2)10.已知函數(shù)f(x)erro

3、r!滿足對任意x1x2，都有x1x2 0 ，求實數(shù) a 的范圍。5設(shè)是定義在上的增函數(shù)，且足不等式的 x 的取值范圍.，求滿6. 已知 f(x)的定義域為（0，），且在其定義域內(nèi)為增函數(shù)，滿足 f（xy）f（x）f（y），f（2）1，試解不等式 f（x）f（x2）3.7. 函數(shù) f(x)對任意的 a、br,都有 f(a+b)=f(a)+f(b)-1,并且當 x0 時，f(x)1.（1）求證：f(x)是 r 上的增函數(shù)；（2）若 f(4)=5,解不等式 f(3m2-m-2)3.“”“”at the end, xiao bian gives you a passage. minand once s

4、aid, people who learn to learn are very happy people. in every wonderful life, learning is an eternal theme. as a professional clerical and teaching position, i understand the importance of continuous learning, life is diligent, nothing can be gained, only continuous learning can achieve better self. only by constantly learning and mastering the latest relevant knowledge, can employees from all walks of life keep up with the pace of enterprise development and innovate to meet the needs of the market. this document is also edited by my studio professionals, there m