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科目: 來源:2010-2011學(xué)年河北省高三下學(xué)期開學(xué)考試數(shù)學(xué)文卷 題型:解答題

(本小題滿分12分)

   已知函數(shù)f(x)=x3-ax2,其中a為實(shí)常數(shù).

   (1)設(shè)當(dāng)x∈(0,1)時,函數(shù)y = f(x)圖象上任一點(diǎn)P處的切線的斜線率為k,若k≥-1,求a的取值范圍

  (2)當(dāng)x∈[-1,1]時,求函數(shù)y=f(x)+a(x2-3x)的最大值.

 

 

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科目: 來源:2010-2011學(xué)年河北省高三下學(xué)期開學(xué)考試數(shù)學(xué)文卷 題型:解答題

(本小題滿分12分)

已知數(shù)列是首項(xiàng)為,公比的等比數(shù)列,設(shè),數(shù)列滿足

(Ⅰ)求的通項(xiàng)公式;

(Ⅱ)若對一切正整數(shù)恒成立,求實(shí)數(shù)的取值范圍.

 

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科目: 來源:2010-2011學(xué)年河北省高三下學(xué)期開學(xué)考試數(shù)學(xué)文卷 題型:解答題

(本小題滿分12分)

已知橢圓:

(Ⅰ)若橢圓的一個焦點(diǎn)到長軸的兩個端點(diǎn)的距離分別為,求橢圓的方程;

(Ⅱ)如圖,過坐標(biāo)原點(diǎn)任作兩條互相垂直的直線與橢圓分別交于四點(diǎn).設(shè)原點(diǎn)到四邊形某一邊的距離為,試求:當(dāng) 的值。                                                                               

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科目: 來源:2010-2011學(xué)年河北省高三12月月考數(shù)學(xué)理卷 題型:選擇題

集合A={-1,0,1},B={},則AB=(    )

    A. {0}      B. {1}         C.{0,1}       D.{-1,0,1}

 

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科目: 來源:2010-2011學(xué)年河北省高三12月月考數(shù)學(xué)理卷 題型:選擇題

已知,且為實(shí)數(shù),則等于(    )

A. 1         B.             C.           D.

 

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科目: 來源:2010-2011學(xué)年河北省高三12月月考數(shù)學(xué)理卷 題型:選擇題

使不等式成立的一個必要不充分條件是(    )

    A.     B.   C. D. ,或

 

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科目: 來源:2010-2011學(xué)年河北省高三12月月考數(shù)學(xué)理卷 題型:選擇題

在等比數(shù)列的值為(    )                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

    A.9           B.1  C.2    D.3

 

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科目: 來源:2010-2011學(xué)年河北省高三12月月考數(shù)學(xué)理卷 題型:選擇題

以雙曲線的中心為頂點(diǎn),右焦點(diǎn)為焦點(diǎn)的拋物線方程是(    )

  A.      B.     C.    D.

 

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科目: 來源:2010-2011學(xué)年河北省高三12月月考數(shù)學(xué)理卷 題型:選擇題

現(xiàn)將10個參加2009年全國高中數(shù)學(xué)競賽的名額分配給某區(qū)四個不同學(xué)校,要求一個學(xué)校1名,一個學(xué)校2名,一個學(xué)校3名,一個學(xué)校4名,,則不同分配方案種數(shù)共有 (    )

A.43200               B.12600              C.24          D.20

 

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科目: 來源:2010-2011學(xué)年河北省高三12月月考數(shù)學(xué)理卷 題型:選擇題

定義運(yùn)算:,將函數(shù)的圖象向左平移)個單位,所得圖象對應(yīng)的函數(shù)為偶函數(shù),則的最小值為(    )

A.             B.            C.            D.

 

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