题目内容
(本小题满分12分) 设函数f(x)=,其中向量
,
.
(1)求f( )的值及f( x)的最大值。
(2)求函数f( x)的单调递增区间.
(1)=
,
取得最大值为
(2)[
](
Z)
解析试题分析:(I) 20090107=
·
=
.
又



当且仅当




(2)由


得






考点:向量坐标运算及三角函数化简性质
点评:向量的数量积坐标运算





练习册系列答案
相关题目
题目内容
(本小题满分12分) 设函数f(x)=,其中向量
,
.
(1)求f( )的值及f( x)的最大值。
(2)求函数f( x)的单调递增区间.
(1)=
,
取得最大值为
(2)[
](
Z)
解析试题分析:(I) 20090107=
·
=
.
又