• 2022-06-06
    中国大学MOOC: 设http://edu-image.nosdn.127.net/_PhotoUploadUtils_b7ec333e-7750-4b60-85f1-7536124da4b9.png是可微函数,http://edu-image.nosdn.127.net/_PhotoUploadUtils_ee7c8959-d08f-429c-873e-e19d48a3eea1.png且http://edu-image.nosdn.127.net/_PhotoUploadUtils_9e3a6838-0c7a-46aa-9ebc-e517e07ac003.pnghttp://edu-image.nosdn.127.net/_PhotoUploadUtils_176d9f96-ca57-445d-9a62-ab294a2b753f.png则