將函數(shù)的反函數(shù)的圖象按向量a = (1.1)平移后得到函數(shù)g (x)的圖象.則g (x)的表達(dá)式為 A. B. C. D. 查看更多

 

題目列表(包括答案和解析)

將函數(shù)的反函數(shù)的圖象按向量a = (1,1)平移后得到函數(shù)g (x)的圖學(xué)科網(wǎng)(Zxxk.Com)象,則g (x)的表達(dá)式為
A                                            B
C                                              D 

查看答案和解析>>

 將函數(shù)的反函數(shù)的圖象按向量a = (1,1)平移后得到函數(shù)g (x)的圖象,則g (x)的表達(dá)式為                                                       (  )

A      B

C       D

 

查看答案和解析>>

將函數(shù)f(x)=2x+1-1的反函數(shù)的圖象按向量
a
=(1,1)平移后得到函數(shù)g(x)的圖象,則g (x)的表達(dá)式為( 。
A.g(x)=log2(x+2)B.g(x)=log2xC.g(x)=log2x-2D.g(x)=log2x+2

查看答案和解析>>

將函數(shù)f(x)=2x+1-1的反函數(shù)的圖象按向量=(1,1)平移后得到函數(shù)g(x)的圖象,則g (x)的表達(dá)式為( )
A.g(x)=log2(x+2)
B.g(x)=log2
C.g(x)=log2x-2
D.g(x)=log2x+2

查看答案和解析>>

將函數(shù)f(x)=2x+1-1的反函數(shù)的圖象按向量=(1,1)平移后得到函數(shù)g(x)的圖象,則g (x)的表達(dá)式為( )
A.g(x)=log2(x+2)
B.g(x)=log2
C.g(x)=log2x-2
D.g(x)=log2x+2

查看答案和解析>>

一.選擇題:DCBBA  DACCA

二.填空題:11.4x-3y-17 = 0  12.33  13.
      14.  15.

三.解答題:

16.(1)解:∵                                  2分
∴由得:,即              4分
又∵,∴                                                                                    6分

(2)解:                                    8分
得:,即          10分
兩邊平方得:,∴                                          12分

17.方法一

(1)證:∵CD⊥AB,CD⊥BC,∴CD⊥平面ABC                                                      2分
又∵CDÌ平面ACD,∴平面ACD⊥平面ABC   4分

(2)解:∵AB⊥BC,AB⊥CD,∴AB⊥平面BCD,故AB⊥BD
∴∠CBD是二面角C-AB-D的平面角          6分
∵在Rt△BCD中,BC = CD,∴∠CBD = 45°
即二面角C-AB-D的大小為45°              8分

(3)解:過點(diǎn)B作BH⊥AC,垂足為H,連結(jié)DH
∵平面ACD⊥平面ABC,∴BH⊥平面ACD,
∴∠BDH為BD與平面ACD所成的角           10分
設(shè)AB = a,在Rt△BHD中,,

,∴                                                                                        12分

方法二
(1)同方法一                                                                                                               4分
(2)解:設(shè)以過B點(diǎn)且∥CD的向量為x軸,為y軸和z軸建立如圖所示的空間直角坐標(biāo)系,設(shè)AB = a,則A(0,0,a),C(0,1,0),D(1,1,0), = (1,1,0), = (0,0,a)
平面ABC的法向量 = (1,0,0)
設(shè)平面ABD的一個(gè)法向量為n = (x,y,z),則

n = (1,-1,0)                           6分

∴二面角C-AB-D的大小為45°                                                                           8分

(3)解: = (0,1,-a), = (1,0,0), = (1,1,0)
設(shè)平面ACD的一個(gè)法向量是m = (x,y,z),則
∴可取m = (0,a,1),設(shè)直線BD與平面ACD所成角為,則向量、m的夾角為
                                                                        10分

,∴                                                                                        12分

18.解:該商場應(yīng)在箱中至少放入x個(gè)其它顏色的球,獲得獎(jiǎng)金數(shù)為,
= 0,100,150,200
,
,                        8分
的分布列為

          <ol id="nmkly"><source id="nmkly"></source></ol>
          <table id="nmkly"><progress id="nmkly"></progress></table>
          <input id="nmkly"><source id="nmkly"><abbr id="nmkly"></abbr></source></input>
            • 0

              100

              150

              200

              P

               

              19.(1)解:設(shè)M (x,y),在△MAB中,| AB | = 2,

                                      2分
              因此點(diǎn)M的軌跡是以A、B為焦點(diǎn)的橢圓,a = 2,c = 1
              ∴曲線C的方程為.                                                                                4分

              (2)解法一:設(shè)直線PQ方程為 (∈R)
              得:                                                            6分
              顯然,方程①的,設(shè)P(x1,y1),Q(x2,y2),則有

                                                                         8分
              ,則t≥3,                                                             10分
              由于函數(shù)在[3,+∞)上是增函數(shù),∴
              ,即S≤3
              ∴△APQ的最大值為3                                                                                              12分

              解法二:設(shè)P(x1,y1),Q(x2,y2),則
              當(dāng)直線PQ的斜率不存在時(shí),易知S = 3
              設(shè)直線PQ方程為
                得:  ①                                         6分
              顯然,方程①的△>0,則
                                                  8分
                                              10分
                  
              ,則,即S<3

              ∴△APQ的最大值為3                                                                                              12分

              20.(1)解:∵
                                                                                       2分
              當(dāng)時(shí),
              ∵當(dāng)時(shí),,此時(shí)函數(shù)遞減;
              當(dāng)時(shí),,此時(shí)函數(shù)遞增;
              ∴當(dāng)時(shí),F(xiàn)(x)取極小值,其極小值為0.                                                          4分

              (2)解:由(1)可知函數(shù)的圖象在處有公共點(diǎn),
              因此若存在的隔離直線,則該直線過這個(gè)公共點(diǎn).
              設(shè)隔離直線的斜率為k,則直線方程為,即              6分
              ,可得當(dāng)時(shí)恒成立
              得:                                                                              8分
              下面證明當(dāng)時(shí)恒成立.
              ,
              ,                                                                           10分
              當(dāng)時(shí),
              ∵當(dāng)時(shí),,此時(shí)函數(shù)遞增;
              當(dāng)時(shí),,此時(shí)函數(shù)遞減;
              ∴當(dāng)時(shí),取極大值,其極大值為0.                                                        12分
              從而,即恒成立.
              ∴函數(shù)存在唯一的隔離直線.                                              13分

              21.(1)解:記
              令x = 1得:
              令x =-1得:
              兩式相減得:
                                                                                                                      2分
              當(dāng)n≥2時(shí),
              當(dāng)n = 1時(shí),,適合上式
                                                                                                               4分

              (2)解:
              注意到                               6分
              ,


              ,即                                             8分

              (3)解:
                  (n≥2)                                                                        10分

                       12分

                                                                     14分

               

               

               


              同步練習(xí)冊答案