二次根式测试题 英文版
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Square root quiz
1. Which of the following must be a square root?
A .2--x
B .x
C .22+x
D .22-x
2.If b b -=-3)3(2,then
A .b>3
B .b<3
C .b ≥3
D .b ≤3
3.If 13-m can be defined ,what will be the smallest integer of m?
A .m=0
B .m=1
C .m=2
D .m=3
4.If x<0,then x
x x 2
-will be A .0 B .—2 C .0或—2 D .2
5.Which of the following square root is simplest square root?
A .14
B .48
C .
b a D .44+a 6.If )6(6-=-⋅x x x x ,then
A .x ≥0
B .x ≥6
C .0≤x ≤6
D .x can be all real numbers
7.①24416a a =;②a a a 25105=⨯; ③a a
a a a =⋅=112;④a a a =-23。 Which one above is wrong?
A .①
B .②
C .③
D .④
8.simplify
6151+A .3011 B .33030 C .30
330 D .1130 9.if a a 241-+与have the same radicands ,then
A .43-=a
B .3
4=a C .a=1 D .a= —1 10.simplify )22(28+-( )A .—2 B .22- C .2 D . 224- 11.①=-2)3.0( ;②=-2)52( 。
12. For what value of x,3
1
-x can be defined? 13.If m<0,then 332||m m m ++= 。
14.For what value of x, we can get such a square root equation 1112-=
-⋅+x x x
15.Which one is larger?
16.=⋅y xy 82 ,=⋅2712 。
17.Calculate 3393a a a a
-+= 。 18.23231
+-与the relationship of the two expressions (please ignore the Chinese character )
19.then 35-=
x ,then 562++x x =?
20.Simplify ⎪⎪⎭⎫ ⎝⎛--+1083114515 21.Find the domain of the following unknowns
(1)43-x (2)
a 831- (3)42+m (4)x 1-
22.Simplify :
(1))169()144(-⨯- (2)22531-
(3)510242
1⨯- (4)n m 218
23.Calculate : (1)21437⎪⎪⎭⎫ ⎝⎛- (2)225241⎪⎪⎭
⎫ ⎝⎛-- (3))459(43332-⨯
(4)⎪⎭⎫ ⎝⎛-⎪⎪⎭⎫ ⎝⎛-126312817
(5)2484554+-+ (6)2332326--
24.If x and y are real numbers ,and 2111+-+- |1|--y y =?