‌设曲线<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/492cbb6357044e2f86f4f3bd830b5b95.png?x-oss-process=image/sharpen,200"/>与曲线<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/905b67d24cd243038609dc48da1524b4.png?x-oss-process=image/sharpen,200"/>在原点有公共切线，则极限<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/190888c6dd9c44ee8fc1d5b0356ebcd9.png?x-oss-process=image/sharpen,200"/>的值为（）.‍