下列命题不正确的是( )<br>·若<img src="/lqwvjeImg/91/919d5fa68671719acca0b33f970cfcc0.png"style="width:44px;height:45px;">收敛,则<img src="/lqwvjeImg/df/dfafbe2a82a6652cc71a5b3805763e88.png"style="width:40px;height:45px;">必收敛<br>·若<img src="/lqwvjeImg/58/589006daabdf7f5f3c4d5491eec3b6bc.png"style="width:40px;height:45px;">发散,则<img src="/lqwvjeImg/df/dfafbe2a82a6652cc71a5b3805763e88.png"style="width:40px;height:45px;">必发散<br>·若<img src="/lqwvjeImg/df/dfafbe2a82a6652cc71a5b3805763e88.png"style="width:40px;height:45px;">收敛,则<img src="/lqwvjeImg/91/919d5fa68671719acca0b33f970cfcc0.png"style="width:44px;height:45px;">未必收敛<br>·若<img src="/lqwvjeImg/df/dfafbe2a82a6652cc71a5b3805763e88.png"style="width:40px;height:45px;">发散,则<img src="/lqwvjeImg/91/919d5fa68671719acca0b33f970cfcc0.png"style="width:44px;height:45px;">必发散.