• 2022-05-31
    设[tex=7.429x2.786]tAg4kjefm91yBdigy4ffjM4OG8pWTp/Pq6CzCEg07PHxvSYMUepw5x98OFTBpo3hulYxZPgZM0zOO1LW2mhgUlrUo07Elv+31vCAVjPV4JM=[/tex],其中[tex=2.714x1.214]cedd0oO+gfBQG4sDRZAPZQ==[/tex]分别是[tex=0.5x0.786]U5O66aolbR1y5vuKrQbXNA==[/tex]级、[tex=0.5x0.786]BgHR5DBWke5rTEC5XEckiQ==[/tex]级方阵,证明:[tex=0.786x1.0]ri6gmnf1+J9dGqG5/1sV6A==[/tex]可逆当且仅当[tex=2.714x1.214]cedd0oO+gfBQG4sDRZAPZQ==[/tex]都可逆,并且当[tex=0.786x1.0]ri6gmnf1+J9dGqG5/1sV6A==[/tex]可逆时,有[tex=9.786x3.357]gFM2A/BG46GBgNRZ7upd5wQ8pmMQEoKDTMt6IZ8jpMR9sW8OkCpCVz+r5gVvWFy4Zq0/ZKSHfwVpTwBDZqlfPlqhqu2nQfVRDdy+rrq35+UwUthU1cy9KzPA0L3JNUef[/tex].