已知<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/cdf545a4f78d477385c8bfccfefb3ca4.png?x-oss-process=image/sharpen,200"/>是微分方程<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/24281fd4813a4a2c9a7c3e4403cdf9a1.png?x-oss-process=image/sharpen,200"/>的解，则该方程的通解为（　）。