2018-2019学年黑龙江省哈尔滨市阿城区第二中学2018-2019高一下学期期中数学试卷 Word版含答案

12-11|数学

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2018-2019学年度第二学期期中考试试卷(高一数学)

一、选择题:(共13题,每题6分)

1.若 INCLUDEPICTURE "https://gallery.fbcontent.cn/latex?decode=false&latex=%24%24a%24%24%25" \* MERGEFORMAT , INCLUDEPICTURE "https://gallery.fbcontent.cn/latex?decode=false&latex=%24%24b%24%24%25" \* MERGEFORMAT , INCLUDEPICTURE "https://gallery.fbcontent.cn/latex?decode=false&latex=%24%24c%24%24%25" \* MERGEFORMAT 为实数,且 INCLUDEPICTURE "https://gallery.fbcontent.cn/latex?decode=false&latex=%24%24a%26lt%3Bb%26lt%3B0%24%24%25" \* MERGEFORMAT ,则下列命题正确的是( ?)。

A. INCLUDEPICTURE "https://gallery.fbcontent.cn/latex?decode=false&latex=%24%24ac%5E2%26lt%3Bbc%5E2%24%24%25" \* MERGEFORMAT B. INCLUDEPICTURE "https://gallery.fbcontent.cn/latex?decode=false&latex=%24%24%5Cfrac1a%26lt%3B%5Cfrac1b%24%24%25" \* MERGEFORMAT C. INCLUDEPICTURE "https://gallery.fbcontent.cn/latex?decode=false&latex=%24%24%5Cfrac%7Bb%7Da%26gt%3B%5Cfrac%7Ba%7Db%24%24%25" \* MERGEFORMAT D. INCLUDEPICTURE "https://gallery.fbcontent.cn/latex?decode=false&latex=%24%24a%5E2%26gt%3Bab%26gt%3Bb%5E2%24%24%25" \* MERGEFORMAT

2.不等式 EMBED Equation.DSMT4 的解集为 EMBED Equation.DSMT4 ,则 EMBED Equation.DSMT4 的值为(???)

A. EMBED Equation.DSMT4 B. EMBED Equation.DSMT4

C. EMBED Equation.DSMT4 D. EMBED Equation.DSMT4

3. 已知向量 EMBED Equation.DSMT4 .若 EMBED Equation.DSMT4 ,则 EMBED Equation.DSMT4 ( )

A.1 B. EMBED Equation.DSMT4 C.2 D.3

4. 函数 EMBED Equation.DSMT4 的最小值为(???)

A.6????B.7????C.8?????D.9

5.在等比数列{an}中,a5、a4、a6成等差数列,则公比q等于( )

A.?1?或?2 ?B.??1?或??2? C.?1?或??2? D.??1?或?2

6.在△ABC中,角A、B、C所对的边分别为 EMBED Equation.DSMT4 己知A=60°, EMBED Equation.DSMT4 则B=( )

A.45°或135° B.135° C.45° D.以上都不对

7.与向量 EMBED Equation.3 共线的单位向量坐标为( )。

A. EMBED Equation.3 或 EMBED Equation.3 B. EMBED Equation.3 或 EMBED Equation.3 C. EMBED Equation.3 或 EMBED Equation.3 D. EMBED Equation.3 或 EMBED Equation.3

8. 《张丘建算经》卷上第22题为:“今有女善织,日益功疾,且从第2天起,每天比前一天多织相同量的布,若第一天织5尺布,现有一月(按30天计),共织390尺布”,则该女最后一天织多少尺布?( )

A.21 B.20 C.18 D.25

9. 正项等比数列 INCLUDEPICTURE "https://solar.fbcontent.cn/api/apolo-images/156c5025f1f4d94.png" \* MERGEFORMAT 中, INCLUDEPICTURE "https://solar.fbcontent.cn/api/apolo-images/15db2d244b2f59a.png" \* MERGEFORMAT ,则? INCLUDEPICTURE "https://solar.fbcontent.cn/api/apolo-images/15c7c268ac89883.png" \* MERGEFORMAT 的值为( )