设由方程<img src="https://static.zxtiku.com/wangke/imgs/topic/38d1ba5c26d4c8d5bb36a2ae69116b3c.png"/> 确定了函数<img src="https://static.zxtiku.com/wangke/imgs/topic/465bdce3b684b6f0a4cff3f32f3484ce.png"/> ,则<img src="https://static.zxtiku.com/wangke/imgs/topic/ea86ebe5e76dd03c79c76c7adb66ad75.png"/> ( ).