4
2
-2
因
16
105
105
105
105
- (α- 1) =-- 1
(-2a") =4a
(a- b) =α?- b?
α3 +α² =2α5
V3
sin(α- 20') =1
α
2
20
40
60
80
2
2B45[
6
图)
Vx- 2
x- 3
x+2y =4k,
-1<x-y<0
k
[2x+y=2k+1
-1<k<-
>>0
0<k<1
二<k<1
2
2
x
x2 +1 =0
x²+2x +1 =0
x² +2x +3 =0
ײ + 2x - 3 =0
Y1 =ax? - x+1
y2 =- 2x2
yi
1
9
1.9
1.9
1
6
4'
8.=
4'8
8
4'
8
y
06
06
90k
(图 2
45
45
45
0
1
B
D
5V3cl
2V5 cm
48.
24
5cm
5
CIL
y==(k>0)
0
12
OFA
A
A2
2010
北师大版初中结业中考考试数学试卷8（含答案）
