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11. 曲線的離心率的取值范圍是

A.               B.               C.               D.(0,1)

試題詳情

10.函的值域是

       A.[0,1]                                                       B.[0,2]

C.[0,]                                                  D.[1,]

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9.展開式中的系數(shù)是

A.6                           B.15                          C.                        D.

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8.正四棱錐的底面邊長等于,側(cè)面與底面成60°的二面角,此四棱錐體積為

A.9                           B.12                          C.15                          D.18

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7.曲線在點(0,1)處的切線與直線垂直,則

A.                         B.                         C.                       D.

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6.已知實數(shù)、同時滿足三個條件:①;② ;③ ,則的

   最小值等于

A.3                        B.4                         C.5                          D.6

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5.若,則

A.                                                 B.

C.                                                D.

試題詳情

4.函數(shù)的圖象

A.關(guān)于軸對稱                                           B.關(guān)于軸對稱

C.關(guān)于直線對稱                                  D.關(guān)于坐標(biāo)原點對稱

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3.原點到直線的距離等于

A.1                           B.2                            C.3                            D.4

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2.設(shè)集合,則

A.{,0}                                                  B.{0,1,2}

C.{,0,1}                                             D.{,,0,1,2}

試題詳情


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