【简答题】设函数f(x)= · ,其中向量 =(2cosx,1), =(cosx, sin2x),x∈R。 (1) 若函数f(x)=1- ,且x∈ ,求x; (2)求函数y=f(x)的单调增区间;并在给出的坐标系中画出y=f(x)在区间 [0,π]上的图像.
【简答题】The future of the company looks____________.
【单选题】Jasmine looks _____visitors to the company.
【单选题】Is the new system better than the old system? 查看材料
A.
Yes, it's much better.
B.
It is a lot more effective.
C.
It doesn't seem that way.
【简答题】The company looks after its staff.
【简答题】设函数f(x)= · ,其中向量 =(2cosx,1), =(cosx, sin2x),x∈R, (Ⅰ)若f(x)=1- 且x∈[- , ],求x; (Ⅱ)若函数y=2sin2x的图象按向右平移m个单位,向上平移n个单位(|m|< ),平移后得到函数y=f(x)的图象,求实数m、n的值。
【简答题】设函数f(x)= a · b ,其中向量 a =(2cosx,1), b =(cosx, sin2x),x∈R, (Ⅰ)若f(x)=1- 且x∈[- , ],求x; (Ⅱ)若函数y=2sin2x的图象按向量 c =(m,n)(|m|< )平移后得到函数y=f(x)的图象,求实数m、n的值。
【单选题】What seems to be the effect of introducing the new system?
A.
The system has given equal opportunities to students.
B.
The system has reduced the number of cram schools.
C.
The system has intensified competition among schools.
D.
The system has increased students' study load.
【单选题】图纸会审后,应由( )整理会议纪要,与会各方签字。