下列等式成立的是（） A. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/bdbd772ef3a88bdbb9b7d40caa3ba8c3.jpg"/> B. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/dc5fb88c5e817bcff07bbef877456ac5.jpg"/> C. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/b564c29155065a8fd5ca4d8db856ee09.jpg"/> D. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/27a16832e681f9ef33242fba8728b883.jpg"/>