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A.        B.     C.       D.不存在

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     A          B           C            D

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 (     )

    A.      B.      C.            D.

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A.             B.1                C.             D.

 

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一.選擇題

1―5  CBABA   6―10  CADDA

二.填空題

11.       12.()       13.2          14.         15.

16.(1,4)

三.解答題

數(shù)學理數(shù)學理17,解:①         =2(1,0)                      (2分)             

        ?,                                        (4分)

?

        cos              =

 

        由,  ,    即B=              (6分)

                                               (7分)

                                                        (9分)

,                                                         (11分)

的取值范圍是(,1                                                      (13分)

18.解:①設雙曲線方程為:  ()                                 (1分)

由橢圓,求得兩焦點,                                           (3分)

,又為一條漸近線

, 解得:                                                     (5分)

                                                    (6分)

②設,則                                                      (7分)

      

?                             (9分)

,  ?              (10分)

                                                (11分)

  ?

?                                        (13分)

      1.   單減區(qū)間為[]        (6分)

         

        ②(i)當                                                      (8分)

        (ii)當,

        ,  (),,

        則有                                                                     (10分)

        ,

                                                       (11分)

          在(0,1]上單調遞減                     (12分)

                                                         (13分)

        20.解:①       

                                                                (2分)

        從而數(shù)列{}是首項為1,公差為C的等差數(shù)列

          即                                (4分)

         

           即………………※              (6分)

        當n=1時,由※得:c<0                                                    (7分)

        當n=2時,由※得:                                                 (8分)

        當n=3時,由※得:                                                 (9分)

            (

                                                  (11分)

                                 (12分)

        綜上分析可知,滿足條件的實數(shù)c不存在.                                    (13分)

        21.解:①設過A作拋物線的切線斜率為K,則切線方程:

                                                                        (2分)

            即

                                                                                                           (3分)

        ②設   又

             

                                                                 (4分)

        同理可得 

                                                        (5分)

        又兩切點交于  ,

                                       (6分)

        ③由  可得:

         

                                                        (8分)

                          (9分)

         

         

         

                                                             (11分)

        當且僅當,取 “=”,此時

                                               (12分)

        22.①證明:由,    

          即證

          ()                                    (1分)

          

              即:                          (3分)

          ()    

           

           

                                                                 (6分)

        ②由      

        數(shù)列

                                                      (8分)

        由①可知, 

                            (10分)

        由錯位相減法得:                                       (11分)

                                            (12分)

         

         


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