• 2022-06-01
    设[tex=4.429x1.357]+LHFXdLw8wfK1Tk/KFhZvOLIa2HJse5nfrGRmJsIVbU=[/tex]均是集合[tex=0.786x1.0]b2qHHLl09vpLlE8vYMXmOw==[/tex]的子集,试证:[tex=11.786x3.357]XUElGO/j+GYRxsQyZUayXo2WzAP41eJTVI3LbdLRUbKsdF/0jvtac5uLccpK2/DdyAorcQQh+7cDsPYLRJ0S3WfRlG4SGwpzpHjbJKXYmuasaAjtIBCCZkCbqE2abtNk[/tex].