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时间:2018-04-07
《高考数学第一轮复习3_函数的值域与最值(一)》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、3.函数的值域与最值(一)班级姓名一、选择题1.下列函数中值域为的是 ()(A) (B)(C)(D)2.函数的定义域为,则其值域为()(A)(B)(C)(D)3.函数的值域为()(A)(B)(C)(D)4.函数的值域为()(A)(B)(C)(D)5.函数的最大值为()(A)(B)(C)(D)二、填空题6.写出下列函数的值域:(1)_______;(2)_____;(3)_______;(4)__;(5).7.设为方程的两根,则的最小值为.8.对记max函数的最小值为.9.给出下列四个命题,其中正确命题为
2、__________________.①已知,则的定义域是;②若函数f(x)=x2-2x+3的值域为[2,3],则其定义域为[1,2];③已知函数的值域为,则此函数定义域为.三、解答题10.求下列函数的值域:1)()2)()32007届高三数学第一轮复习训练(3)第页共2页11.若函数的定义域为R.(1)求实数m的取值范围;(2)若f(x)的最小值为g(m),求g(m)值域.12.设为常数).(1)时,求最小值;(2)求所有使的值域为的值.内部资料仅供参考9JWKffwvG#tYM*Jg&6a*CZ7H
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