0  11345  11353  11359  11363  11369  11371  11375  11381  11383  11389  11395  11399  11401  11405  11411  11413  11419  11423  11425  11429  11431  11435  11437  11439  11440  11441  11443  11444  11445  11447  11449  11453  11455  11459  11461  11465  11471  11473  11479  11483  11485  11489  11495  11501  11503  11509  11513  11515  11521  11525  11531  11539  447090 

       A.6ec8aac122bd4f6e             B.6ec8aac122bd4f6e              C.6ec8aac122bd4f6e               D.6ec8aac122bd4f6e

(文科)设{an}是公差为-2的等差数列,如果a1+ a4+ a7=50,则a6+ a9+ a12=   (    )

       A. 20                    B.30                      C.40                        D.1

试题详情

5.(理科)在等差数列6ec8aac122bd4f6e中,设6ec8aac122bd4f6e为其前6ec8aac122bd4f6e项和,已知6ec8aac122bd4f6e,则6ec8aac122bd4f6e等于 (    )

试题详情

A.6ec8aac122bd4f6e  B.6ec8aac122bd4f6e  C.6ec8aac122bd4f6e   D.6ec8aac122bd4f6e

试题详情

(文科)曲线6ec8aac122bd4f6e在点(1,6)处的切线方程为                (    )

试题详情

4.(理科)已知函数6ec8aac122bd4f6e 在点6ec8aac122bd4f6e处连续,则6ec8aac122bd4f6e的值是 (    )

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

试题详情

C.沿x轴向右平移6ec8aac122bd4f6e个单位                      D.沿x轴向左平移6ec8aac122bd4f6e个单位

试题详情

A.  沿x轴向左平移6ec8aac122bd4f6e个单位                    B.沿x轴向右平移6ec8aac122bd4f6e个单位

试题详情

3.我们知道,函数6ec8aac122bd4f6e的图象经过适当变换可以得到6ec8aac122bd4f6e的图象,则这种变换可以是                                                              (    )                                                         

试题详情

           A.6ec8aac122bd4f6e                   B.6ec8aac122bd4f6e                   C.6ec8aac122bd4f6e               D.6ec8aac122bd4f6e

(文科)已知向量a= (-3 ,2 ) , b=(x, -4) , 若a//b,则x=                      (    )

A  .6              B .5             C .4          D.7

试题详情

2.(理科)复数6ec8aac122bd4f6e等于                                                                               (    )

试题详情


同步练习册答案