16.设a=0.70.7,b=0.71.6,c=1.60.7,则a,b,c的大小关系是( )
A. | a<b<c | B. | a<c<b | C. | b<a<c | D. | b<c<a |
15.设命题p:函数y=-xsinx的图象关于y轴对称,命题q:函数f(x)=x2-2x+3在区间[2,4]上的最小值是2,则下列命题中正确的是( )
A. | p∧q | B. | ¬p∨q | C. | ¬p∧q | D. | ¬p∨¬q |
14.设全集U=R,已知集合A={x∈Z||x-1|≤2},$B=\left\{{\left.x\right|y=\sqrt{{x^2}+2x-3}}\right\}$,则集合A∩∁UB的真子集个数为( )
A. | 3 | B. | 4 | C. | 7 | D. | 8 |
11.已知点(x,y)满足$\left\{\begin{array}{l}x+y-3<0\\ x-2y-3<0\\ x>1\end{array}\right.$,则z=y-x的取值范围为( )
0 250848 250856 250862 250866 250872 250874 250878 250884 250886 250892 250898 250902 250904 250908 250914 250916 250922 250926 250928 250932 250934 250938 250940 250942 250943 250944 250946 250947 250948 250950 250952 250956 250958 250962 250964 250968 250974 250976 250982 250986 250988 250992 250998 251004 251006 251012 251016 251018 251024 251028 251034 251042 266669
A. | (-2,1) | B. | [-2,1] | C. | (-3,1) | D. | [-3,1] |