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【单选题】
--Mrs. Black, I'm afraid that I'll fail the exam --_____,dear! Take it easy. I'm sure you'll pass it.
A.
Sorry to hear that
B.
Come on
C.
All right
D.
Good job
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【简答题】已知函数f(x)=2cosx(cosx-sinx)+1,x∈R (1)求函数f(x)的最小正周期; (2)求函数f(x)在区间 [ π 8 , 3π 4 ] 上的最小值与最大值. (3)将函数y=f(x)的图象按向量 d 平移,使平移后得到的图象关于坐标原点成中心对称,求长度最小的 d .
【简答题】已知函数 f(x)= 2 cos(2x- π 4 ) ,x∈R. (1)求函数f(x)的最小正周期和单调递增区间; (2)求函数f(x)在区间 [- π 8 , π 2 ] 上的最小值和最大值,并求出取得最值时x的值.
【简答题】已知函数f(x)=2cosx(sinx-cosx)+1,x∈R. (Ⅰ)求函数f(x)的最小正周期; (Ⅱ)求函数f(x)在区间 [ π 8 , 3π 4 ] 上的最小值和最大值.
【简答题】已知函数 f(x)= 2 x +alnx ,a∈R. (Ⅰ)若a=4,求函数f(x)的单调区间; (Ⅱ)若函数f(x)在[1,+∞)上单调递增,求实数a的取值范围; (Ⅲ)记函数g(x)=x 2 f'(x)+2x 3 ,若函数g(x)的最小值为 -2-8 2 ,求函数f(x)的解析式.
【单选题】While it is impossible to live completely free of stress, it is possible to prevent stress as well as reduce its effect when it can’t be avoided. 1
A.
Do whatever you like and want to do.
B.
You should make every effort to eat well and get enough rest.
C.
Make a list of things to do.
D.
Try physical activity.
E.
You need a break from your daily routine to just relax and have fun.
F.
You could smile to yourself in front of a mirror every day.
G.
The following are suggestions for ways to deal with stress.
【简答题】六级作文句型举例 1) 主语从句 It is universally acknowledged that the successful people have one trait in common, that is, to get along with others and cooperated with others well. 2) 宾语从句 Some others, however, ar...
【判断题】城市轨道交通枢纽的交通功能空间包括静态交通空间及公共开放空间。
A.
正确
B.
错误
【简答题】已知函数f(x)=x 2 -4x+(2-a)lnx,(a∈R,a≠0). (1)当a=8时,求函数f(x)的单调区间; (2)求函数f(x)在区间[e,e 2 ]上的最小值.
【简答题】对于二次函数f(x)=-4x 2 +8x-3 (1)求函数f(x)图象的开口方向、f(x)的对称轴方程、顶点坐标,函数的值域; (2)求函数f(x)的零点; (3)求函数f(x)的单调区间,以及在每一单调区间上,它是增函数还是减函数.
【简答题】已知f(x)=x 3 -ax 2 -4x(a为常数),若函数f(x)在x=2处取得一个极值, (1)求函数f(x)的单调区间; (2)若经过点A(2,c),(c≠-8)可作曲线y=f(x)的三条切线,求实数c的取值范围.
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