2017中考数学一轮复习教案完整版 - 百度文库 ر

(A)xx=x (B)(xy)xy=(xy)

104284n2n3n3n+2

(C)x(xx)=x (D)(xx) x=x

1221253

10⣩⣩⣬ֵΪ A1 B2 C3 D3 11㣺

24331522

(1) (2ax)( xyz) ( axy)

521n+2n+11n1

(2) ( a+2a) ( a)

33

(3) 5(m+n)(mn)2(m+n)3(mn) (4)(ab+cd)(abcd)

2222

(5)(xy)(xxy+y) (6)15+2a{9a[a9(36a)]}

22

7acbc(ab+c)(a+bc)

2222

(8)(ab)(a+b)(a+b)(a-b)+2b(a+b)

13

2

2

n+2n+12532

4 ʽֽ

֪ʶ㡽

ʽֽⶨ壬ȡʽӦùʽֽⷨʽʽʮ˷ʽֽһ㲽衣 Ҫ

ʽֽĸȡʽʽֽⷨʽֽⷽöηʽֽζʽķܰѼ򵥶ʽֽʽ ص볣͡

ʽֽпУʽֵֽƵʺܸߡص㿼ķʽȡʽӦùʽֽⷨǵۺáϰΪ࣬Ҳѡͽ⡣

ʽֽ֪ʶ ʽʽֽ⣬ǰһʽΪʽĻֽʽҪеÿһʽٷֽΪֹֽʽij÷У (1)ṫʽ

ʽam?bm?cm?m(a?b?c),

mʽĹʽ mȿһʽҲһʽ (2)ùʽ

a2?b2?(a?b)(a?b), a2?2ab?b2?(a?b)2,a3?b3?(a?b)(a2?ab?b2)д

(3)ʮ˷

ڶϵΪlĶʽx?px?q, Ѱab=qa+b=pabУx2?px?q?(x?a)(x?b);һĶʽax?bx?c(a?0),Ѱ

a1a2=ac1c2=c,a1c2+a2c1=ba1a2c1c2Уax?bx?c?(a1x?c1)(a2x?c2). (4)ֽⷨѸʵ飬ʹֽʽܷУʹֽʽڸ֮У

ʱҪõţǰǡ+ţĸţǰǡ-ţĸı.

(5)ʽax?bx?c?0(a?0),X1X2ô ax2?bx?c?a(x?x1)(x?x2). ͣ

1ʽֽУȷǣ

222212122

(A) 1- x= (x + 2) (x- 2) (B)4x C2 x C 2 = - 2(x- 1)

44(C) ( x- y ) C(y- x) = (x C y) (x C y + 1) ( x Cy C 1)

14

3

(D) x Cy C x + y = ( x + y) (x C y C 1)

222

2иʽ(1) a b = (a + b) (aCb ),(2) xC3x +2 = x(xC3) + 2 11112 2

(3 ) 2 ,(4 )x+ 2 2 x ) 2

x Cy ( x + y) (x C y ) x xʽֽĸΪ

(A) 1 (B) 2 (C) 3 (D) 4

2

3xmx25 һȫƽʽmֵǣ (A) 20 (B) 10 (C) 20 (D) 10

2

4xmxnֽܷ( x+2 ) (x C 5)m= ,n= ;

2

5ʽ2x+x+5mʵΧʽֽ⣬m= ;

2

6x+kx6һʽ(x2)kֵ ; 7ʽʽֽ⣺

3222

(1)aa2a (2)4m9n4m+1

222

(3)3a+bc3ac-ab (4)9x+2xyy

8ʵΧʽֽ⣺

222

(1)2x3x1 (2)2x+5xy+2y

ѵ

1. ֽʽ

2n+1nn-1

(1).10a(xy)5b(yx) (2).a4a4a

3

(3).x(2xy)2xy (4).x(6x1)1

122

(5).2ax10ay5by6x (6).1aab b

4

422

*(7).a4 (8).(xx)(xx3)2

5522

(9).xy9xy (10).4x3xy2y

52

(11).4aa (12).2x4x1

22

(13).4y4y5 (14)3X7X+2

ָ

1:(1) (a3)a6a9 (2) x4(x 2)( x 2)

121122222

(3) axaxyaa(xax) (4) x x x4x4(x2)ʽ

1644⣬ȷĸǣ

A1 B2 C3 D4

2

2ۣΪֵʽᣫ4ᣭ5ֵ

Aڻ0 B0 C0 DС0

15

2

2

22

3x2m3x16 һȫƽʽmֵǣ A5 B7 C1 D71

222222

4(xy)(x1y)120,xyֵ 5ֽʽ

366

(1).8xy(xy)2(yx) (2).xy

32

(3).x2xyxxy (4).(xy)(xy1)12

222

(5).4⣭1ᣩ1⣩ (6).3m2m4

33

4֪ab1,a3abbֵ

222

5ᡢ⡢ΪSABCߣʽֽ˵⣭ᣫ2㣭ķ

2

605Ϊ23ʮ˷ֽʽģ

ѵ

222233

1ʽxy, x2xyy, xyĹʽ 2ʵʽʹ߿ɷֽΪұߵĽ

12222

(1)9x( )(3x )( y), (2).5x6xy8y(x )( 4y).

53εΪ6x13x5 (x>0),һ߳Ϊ2x1,Ϊ

2

4aa6ֽʽȷ( )

(A)a(a1)6 (B)(a2)(a3) (C)(a2)(a3) (D)(a1)(a6)

12222222

5ʽa4ab2b,a4ab16b,aa ,9a12ab4bУȫƽʽ

4ʽ( )

(A) 1 (B) 2 (C) 3 (D) 4 6(xy)(x2y)150,xyֵǣ (A)-53 (B) -35 (C)3 (D)5

2

7ڵĶʽx4xcֽܷϵһεĻʽôcȡĸֵеģ

(A) 8 (B) 7 (C) 6 (D) 5

2

8xmxn(x4)(x3) m,nֵΪ

(A) m1, n12 (B)m1,n12 (C) m1,n12 (D) m1,n12. 252

9ʽymy һȫƽʽmֵ

4

xy22

10֪2x3xyy0x,yΪ㣩 ֵΪ

yx11ֽʽ:

222

(1).x(yz)81(zy) (2).9m6m2nn

222242

(3).ab(cd)cd(ab) (4).a3a4

16

2

2