• 2022-06-09
    设[tex=8.571x1.929]i7vzbtmrNnPXa6DLYXijkGsg1q9tSkiHjLL6OjqGMlWO9ZHFJCn0gswza1GHndhEHOr6iENIQ7JxA2bf50ruMw==[/tex],试证[tex=5.357x1.214]D28KQJnVXixa3JWi6HmxGa30ql6iibqHtrL8KBTN2G0=[/tex]四点共面的充要条件是存在不全为零的实数[tex=5.286x1.357]1kDNSVac8qJfOaaU9dKXGw==[/tex]使[tex=12.214x1.214]oYkS9fWMF1p0knbVAVu3LUWX7I8AbTUh30FLL6gpr3qBGj116yHGd+5ZONsl3gfiO+Jt7sTqHQD05WLh5qOCf+PP71pdH31JMxdQJTotAqnHj2z4yKMDLEvYtM6orftNEc07p28iu8z2Fj34sXrLh0jkSvb5iapit+LppIPVZO8=[/tex],且[tex=3.714x3.429]pHtLErPjgAvUVSmfXKXA7NhYijLAiJE3oJz7IQudk1Q=[/tex]
  • 举一反三