6.不等式|2x-1|≤3的整数解组成的集合为( )
| A. | {0,1} | B. | {-1,0,1} | C. | {-1,0,1,2} | D. | {0,1,2} |
5.不等式x2-m2≤0(m<0)的解集为( )
| A. | [-m,m] | B. | (-∞,-m]∪[m,+∞) | C. | [m,-m] | D. | (-∞,m]∪[-m,+∞) |
4.不等式x2-2x-15≥0的解集为( )
| A. | (-∞,-3]∪[5,+∞) | B. | [-3,5] | C. | [-5,3] | D. | (-∞,-5)∪[3,+∞) |
3.数集{x|0<x≤2,x∈R}用区间表示为( )
| A. | [0,2] | B. | (0,2] | C. | [0,2) | D. | (0,2) |
2.不等式4x2-9<0的解集为( )
0 250906 250914 250920 250924 250930 250932 250936 250942 250944 250950 250956 250960 250962 250966 250972 250974 250980 250984 250986 250990 250992 250996 250998 251000 251001 251002 251004 251005 251006 251008 251010 251014 251016 251020 251022 251026 251032 251034 251040 251044 251046 251050 251056 251062 251064 251070 251074 251076 251082 251086 251092 251100 266669
| A. | (-$\frac{3}{2}$,$\frac{3}{2}$) | B. | (-$\frac{9}{4}$,$\frac{9}{4}$) | C. | [-$\frac{3}{2}$,$\frac{3}{2}$] | D. | [-$\frac{9}{4}$,$\frac{9}{4}$] |