‍记曲线<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/d3083e264a0f4511a7314fa34208a7d0.png?x-oss-process=image/sharpen,200"/>与直线<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/ab4e1df98a2749d8b930b2f489b47bf1.png?x-oss-process=image/sharpen,200"/>所围图形的面积为<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/838949495d644198a975a60d5f8c8d1b.png?x-oss-process=image/sharpen,200"/>，则<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/838949495d644198a975a60d5f8c8d1b.png?x-oss-process=image/sharpen,200"/>为（）．‎