四川省高职单招考试《数学》模拟试卷(二)

A3                                                                      

B4

C6                                                                      

D12

2. 若a>b>0,c>d>0,则的关系是().

A

B

C

D无法确定

A81                                                                        

B27

C22                                                                        

D9

4. 等差数列的公差是2,若a₂,a₄,a₈成等比数列，则的前n项和Sn=(   ).  

An(n+1)

Bn(n-1)

C

D

5. 已知三个集合U,A,B之间的关系如图所示，则

A{3}

B{0,1,2,4,7,8}

C{1,2}

D{1,2,3}