1. 难度:中等 | |
(2002•泸州)下列二次根式中与![]() A. ![]() B. ![]() C. ![]() D. ![]() |
2. 难度:中等 | |
(2003•辽宁)在下列各组根式中,是同类二次根式的是( ) A. ![]() ![]() B. ![]() ![]() C. ![]() ![]() D. ![]() ![]() |
3. 难度:中等 | |
(2003•黄冈)下列各式经过化简后与![]() A. ![]() B. ![]() C. ![]() D. ![]() |
4. 难度:中等 | |
(2005•菏泽)已知![]() ![]() A.5 B.6 C.3 D.4 |
5. 难度:中等 | |
(2003•天津)若x=![]() ![]() A.-2 B.0 C.2 D. ![]() |
6. 难度:中等 | |
(2003•辽宁)关于x的方程x2+![]() A.k≥1 B.k>0 C.k>1 D.k≥0 |
7. 难度:中等 | |
(2010•内江)在函数![]() A.x≠-1 B.x≠0 C.x≥-1 D.x≥-1,且x≠0 |
8. 难度:中等 | |
(2009•湘潭)在函数y=![]() A.x≥-3 B.x≤-3 C.x≥3 D.x≤3 |
9. 难度:中等 | |
(2009•武汉)函数y=![]() A.x≥- ![]() B.x≥ ![]() C.x≤- ![]() D.x≤ ![]() |
10. 难度:中等 | |
(2004•绍兴)函数![]() A.x≥2 B.x>2 C.x<2 D.x≠2 |
11. 难度:中等 | |
(2003•资阳)下列函数中,自变量取值范围正确的是( ) A.y=3x-1中, ![]() B.y=x中,x为全体实数 C. ![]() D. ![]() |
12. 难度:中等 | |
(2003•宜昌)函数y=![]() A.x≤3 B.x≥3 C.x≤-3且x≠-1 D.x≥-3且x≠-1 |
13. 难度:中等 | |
(2003•青岛)函数![]() A.x≥5 B.x>5 C.x≥-5 D.x≤5 |
14. 难度:中等 | |
(2003•常德)函数y=![]() A.x≥-2且x≠3 B.x>-2且x≠3 C.x≥-2 D.x>-2 |
15. 难度:中等 | |
(2003•苏州)已知x<2,化简:![]() |
16. 难度:中等 | |
(2003•三明)当a 时,![]() ![]() |
17. 难度:中等 | |
(2003•青海)如果x<5时,那么![]() |
18. 难度:中等 | |
(2003•青岛)当a<1且a≠0时,化简![]() |
19. 难度:中等 | |
(2003•河南)实数p在数轴上的位置如图所示,化简![]() ![]() |
20. 难度:中等 | |
(2003•上海)在![]() ![]() ![]() ![]() |
21. 难度:中等 | |
(2003•广西)把二次根式![]() |
22. 难度:中等 | |
(2008•大庆)计算:(2-![]() ![]() |
23. 难度:中等 | |
(2005•上海)计算:(![]() ![]() |
24. 难度:中等 | |
(2003•宁夏)已知最简二次根式![]() ![]() |
25. 难度:中等 | |
(2003•仙桃)若最简二次根式![]() ![]() |
26. 难度:中等 | |
(2005•三明)计算:![]() ![]() |
27. 难度:中等 | |
(2003•重庆)计算:![]() |
28. 难度:中等 | |
(2003•荆州)计算![]() |
29. 难度:中等 | |
(2003•常德)化简:![]() ![]() ![]() ![]() |