下列等式成立的是( )<br>·<img src="/lqwvjeImg/5f/5fbb1ede4722c2f77f216669640377a9.png"style="width:88px;height:44px;">;<br>·<img src="/lqwvjeImg/71/71d30fee6db396d0fe6f56e8087bb16f.png"style="width:89px;height:44px;">;<br>·<img src="/lqwvjeImg/bf/bf79c19f04fe9b71add1f7757c182fe7.png"style="width:87px;height:44px;">;<br>·<img src="/lqwvjeImg/96/96a48e4e02f071582eb5b08e83f957d2.png"style="width:81px;height:41px;">。