已知f(x)=|x
2-1|+x
2+kx.
(I)若k=2,求方程f(x)=0的解;
(II)若关于x的方程f(x)=0在(0,2)上有两个解x
1,x
2,求k的取值范围,并证明
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517683335731/SYS201311012245176833357020_ST/0.png)
.
考点分析:
相关试题推荐
已知集合A={x|(x-2)[x-(3a+1)]<0},
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517683335731/SYS201311012245176833357019_ST/0.png)
.
(Ⅰ) 当a=2时,求A∩B;
(Ⅱ) 求使B⊆A的实数a的取值范围.
查看答案
已知△ABC的三个内角A、B、C所对的边分别为a,b,c,向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517683335731/SYS201311012245176833357018_ST/0.png)
=(4,-1)
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517683335731/SYS201311012245176833357018_ST/1.png)
,且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517683335731/SYS201311012245176833357018_ST/2.png)
.
(1)求角A的大小;
(2)若a=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517683335731/SYS201311012245176833357018_ST/3.png)
,试判断b×c取得最大值时△ABC形状.
查看答案
(难图象与性质)已知函数f(x)=2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517683335731/SYS201311012245176833357017_ST/0.png)
sin(2ωx+φ)(ω>0,φ∈(0,π))的图象中相邻两条对称轴间的距离为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517683335731/SYS201311012245176833357017_ST/1.png)
,且点
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517683335731/SYS201311012245176833357017_ST/2.png)
是它的一个对称中心.
(1)求f(x)的表达式;
(2)若f(ax)(a>0)在
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517683335731/SYS201311012245176833357017_ST/3.png)
上是单调递减函数,求a的最大值.
查看答案
若周期函数f(x)是定义在R上的奇函数,且f(x)的最小正周期为3,f(1)<2,f(2)=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517683335731/SYS201311012245176833357016_ST/0.png)
则m的取值范围为
.
查看答案
已知函数f(x)=sinx+cos(x+t)为偶函数,且t满足不等式t
2-3t-40<0,则t的值为
.
查看答案