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 =?

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