• 2022-10-30
    向量 [tex=14.643x1.357]HmEJ2soAYcWvxEpTT6YU7adVoVg0w1/R3HSVJ9NtshEKNq+Al+925TeB9Vu4Wx9ATd/XbFCXxJV8IFN/VhxYVg==[/tex]; 向量 [tex=0.571x0.786]669Mvdj7CNHiNiUJFR25dQ==[/tex] 与 [tex=1.5x1.214]JT5rD7w5ZOKJlhD36Nwislv7N+9Rg5zylNz9HAhXYeA=[/tex],  共面,与 [tex=0.571x0.786]HIkGgNxLOKiwh36TiP6EzA==[/tex] 正交,且模为 3 ;求 [tex=0.571x0.786]669Mvdj7CNHiNiUJFR25dQ==[/tex]