<p>设函数<img src="https://file.gaojiufeng.cn/learnAppQuestion/16/8a/168ac7cf162b2ebb6ff192deda9c0031.jpg" style="width: 100%;height: auto;">，则<img src="https://file.gaojiufeng.cn/learnAppQuestion/9f/43/9f4364fe730bcf7c8a42111efbfad048.jpg" style="width: 100%;height: auto;">＝()．</p>