若已知[tex=11.0x2.786]NeoTBlf1CmkUoMf07Si5dONnEizZ9+4qA64A4obqOHOEJsABtYxFrovjkXHAWe0EZu9QGbHCIyvM2H5wp/b+CG3er4o3op5N2ve5uuHNzPhwmV1YO4bm5uPAGxCmSD7luH0xApuD/BnrJ9iabC0vtyZbNY0iuHaU0egCtLr6u2OxmyVFhguynFrP3kI/jS4k[/tex]，则[tex=1.786x1.0]NjgLQLZcNW6/ODPPPhzpbCGBay12Se5HC4OMGe5EDzc=[/tex] 未知类型：{'options': ['[tex=5.357x2.786]NeoTBlf1CmkUoMf07Si5dNcMmoYIFyd/d24VIPh8rzW/rRUQlo7RxEbuM5TAxRVkH0lQ3xnIPlnxCZyPWoz9OA==[/tex]', '[tex=5.357x2.786]NeoTBlf1CmkUoMf07Si5dBDOrFQTwVsvhC3rNxLlBlRblaMyIkMOLhGiu75cniCMY3/o0uYO1yfS8d3QvJPlBA==[/tex]', '[tex=5.357x2.786]NeoTBlf1CmkUoMf07Si5dC0Oz3ed7SQ9Kfbfihaz4UR1ONis+Eqb9CL5xO/9VOyjNn7X3YOGPklKiED3I1vUFQ==[/tex]', '[tex=5.357x2.786]NeoTBlf1CmkUoMf07Si5dI482Odl+VigweGzIXg0NFL8iM6IAWgrhVpQbYYfQJfAg34TprNd+SPNCCQKfuC56A==[/tex]'], 'type': 102}

解下列方程组，并给出几何解释：[tex=5.357x2.786]fnpmC2J6JmQBLyo5NmGAz0R7aB9CZy57aHpdPdn7kbhh2Z2ec6HE+rYi0+qHKY9T9VAzH7jUf0wEh63h8W1qUw==[/tex]

解下列方程组，并给出几何解释：[tex=5.357x2.786]fnpmC2J6JmQBLyo5NmGAz0R7aB9CZy57aHpdPdn7kbhh2Z2ec6HE+rYi0+qHKY9T9VAzH7jUf0wEh63h8W1qUw==[/tex]

求过点[tex=3.071x1.286]JydqQsgMELHr5yHraGBk6A==[/tex]且与直线[tex=5.357x2.786]7EJHVCtO2IWq3KpdB+jQsrGIn3CnESdKE2nkkyONasN1tiSakuT8s9opSM6EOJlj7Y2/rrzOeHiBT254KR+jpQ==[/tex]平行的直线．

求下列函数对自变量的二阶偏导数，[tex=0.5x1.214]0K9Xf7VHWdVeOrSYAKIm6Q==[/tex]具有二阶连续偏导数：[tex=5.357x2.786]LNUTXpClIljsm+BBhtqheScQO3XimE8kOdVqHPn66nk=[/tex]

证明:在每一点都不连续的狄利克雷函数[tex=5.357x2.786]7yll5VImfLbHVeVMaHM4DK8Ykz+edcsvEO30P8hG8lRLkfzljAzS/P+thR5dZO77wWnK/IFa2AlvSg6l2b7Xxg==[/tex][tex=5.643x2.714]irMnVPLkqbzPQJSayk+3+0Sang5yJxKjFK8nzXPv2IWugPhCDbJ62UBXCNxwssOEcKoxDMgExFJcLRG1ejujkg==[/tex]满足方程[tex=3.5x1.429]gc269xbFiXVOeeLB2iY2Pg==[/tex].

下列矩阵是否与对角矩阵相似？若相似于对角矩阵, 求 [tex=0.714x1.286]BMKsEVFNvpiLV0UsqDFXCw==[/tex] 使 [tex=3.214x1.286]1sFdXzzqHCc4qLXdM8ki4Toicy90dsQBVNzF4LK8JX8=[/tex] 为对角矩阵.[p=align:center][tex=5.357x2.786]jcCMHflCR8OS9TosV6N5vFWjToaaWqOOGqoRSEmRakI8euajTYJW+cFHO0sg+D0a+NjWo5p5K3fsrlwkGSJ1tg==[/tex]

下列变量组（）是一个闭回路。 A: {x，x，x，x，x，x} B: {x，x，x，x，x} C: {x，x，x，x，x，x} D: {x，x，x，x，x，x}

以下谓词蕴含式正确的是（）: (∀x) (A(x)→B(x))=>( ∀x)A(x)→(∀x)B(x)|(∀x) (A(x)↔B(x))=>( ∀x)A(x)↔(∀x)B(x)|(∀x)A(x)∨(∀x)B(x)=>( ∀x) (A(x)∨B(x))|(∃x) (A(x)∧B(x))=>(∃x)A(x)∧(∃x)B(x)

以下谓词蕴含式正确的是（）: (?x) (A(x)→B(x))=>( ?x)A(x)→(?x)B(x)|(?x) (A(x)?B(x))=>( ?x)A(x)?(?x)B(x)|(?x)A(x)∨(?x)B(x)=>( ?x) (A(x)∨B(x))|(?x) (A(x)∧B(x))=>(?x)A(x)∧(?x)B(x)