设A，B是可逆矩阵，且A与B相似，则下列结论错误的是(  )．

A 函数f(x)有2个极值点，曲线y=f(x)有2个拐点 B 函数f(x)有2个极值点，曲线y=f(x)有3个拐点 C 函数f(x)有3个极值点，曲线y=f(x)有1个拐点 D 函数f(x)有3个极值点，曲线y=f(x)有2个拐点

A <img width="101" height="23" src="https://www.beizhujiaoyu.com/uploads/202208/20210520000927_2580.jpg" /> B <img width="101" height="23" src="https://www.beizhujiaoyu.com/uploads/202208/20210520000929_1798.jpg" /> C <img width="100" height="22" src="https://www.beizhujiaoyu.com/uploads/202208/20210520000929_3674.jpg" /> D <img width="99" height="23" src="https://www.beizhujiaoyu.com/uploads/202208/20210520000931_3360.jpg" />

A J₁<J₂<J₃ B J₃<J₁<J₂ C J₂<J₃<J₁ D J₂<J₁<J₃

A 绝对收敛 B 条件收敛 C 发散 D 收敛性与k有关

A a>1 B a<-2 C -2<a<1 D a=1或a=-2

A P(<img width="24" height="42" src="https://www.beizhujiaoyu.com/uploads/202208/20210520000935_7110.gif" />|<img width="24" height="42" src="https://www.beizhujiaoyu.com/uploads/202208/20210520000935_8830.gif" />)=1 B P(A|<img width="24" height="42" src="https://www.beizhujiaoyu.com/uploads/202208/20210520000935_7110.gif" />)=0 C P(A∪B)=1 D P(B|A)=1

A 6 B 8 C 14 D 15