由<img src="https://static.zxtiku.com/wangke/imgs/topic/fa61e2d3bf64dd6a0f8a4df06f0bc96f.png"/>在闭区间<img src="https://static.zxtiku.com/wangke/imgs/topic/9fdb90cb703d98e73b99068bf9f5dc62.png"/>上满足拉格朗日中值定理，求定理中的<img src="https://static.zxtiku.com/wangke/imgs/topic/62ef1193eb1aaf5a3d13c59749b02aff.png"/> ( )‌