永州市2008年初中毕业数学学业考试试卷

永州市2008年初中毕业数学学业考试试卷

永州市 2008 年初中毕业学业考试试卷

数学参考答案及评分标准 一、填空题(每小题 3 分，共 24 分) 填空题( 1. 3% 2. 4.37 × 10 2 10

3. ∠1 = ∠4 或 ∠1 = ∠3 或 ∠1 + ∠2 = 180 6.45° 7. (3,1) 8.4

4. 3600(1 + x) = 4900

5. 4 + 4 2

二、选择题(每小题 3 分，共 24 分) 选择题( 9 10 11 题号 答案 三、解答题 17. 分)解：原式 = (6 C B A

12 D

13 C

14 D

15 A

16 A

2 1 × 4 1 + 32 + ······························································ 2 分 2 2 1

= 2 2 1 + 4 2 + 2 + 1 ···································································4 分 = 7 2 ··································································································6 分 18. 分)解： (6

1 2x +2= ························································································· 1 分 x 1 x +1

方程两边同乘以 ( x + 1)( x 1) ,得

x + 1 + 2( x + 1)( x 1) = 2 x( x 1) ·························································································· 3 分

1 ······················································································································· 4 分 3 1 检验：把 x = 代入 ( x + 1)( x 1) 得 3 解之，得 x =

1 1 + 1 1 ≠ 0 ················································································································ 5 分 3 3 ∴x = 1 是原方程的根. ········································································································ 6 分 3

19. 分) (6

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