求矩阵方程[tex=4.786x1.143]H9S8z2blJXaVphQETw95Fg==[/tex]，其中[tex=9.357x3.643]QN0fTQbn6M33pU3gx/S2sskwPlrKAzoJ8mdYiTYC7tGO8szMd8p+2cNkEYkSMjdsANbknV+iJQh+J809zadp79g509gaMWeT6/svoAyzdUJEeD0/oHbgF3bAj/jVoWDM[/tex]，[tex=7.071x3.643]DgXZT9CtCPAglTYwc4pEdaW9CmkkN7KSp7oXBK1jNeVVp3uIDYR9ryBYepwcyLDiivkA6raYMPp/oSHjfyBBw3StMI4KYC8c8tgVzNWxNFc=[/tex]。

解下列矩阵方程：[tex=4.786x1.143]SBrLCVZb0oIRk0NSteMVIg==[/tex], 其中[tex=9.357x3.643]QN0fTQbn6M33pU3gx/S2sskwPlrKAzoJ8mdYiTYC7tGO8szMd8p+2cNkEYkSMjdsANbknV+iJQh+J809zadp79g509gaMWeT6/svoAyzdUJEeD0/oHbgF3bAj/jVoWDM[/tex], [tex=7.071x3.643]DgXZT9CtCPAglTYwc4pEdTYIay0w+N644riaOQUVnBefFJCJvM3AhWpg9OHZYI3VXkBhQERag/69moKfOrghzSp3wnxIh7EjbNliO65dRLk=[/tex]

中国大学MOOC: 已知一组数据：x=[1, 2, 3, 4, 5, 6, 7, 8, 9, 10];y=[1.3, 5, 8.8, 6.5, 2.4, 3.5, 2, 5.5, 9.2, 10];z=1.6401, 3.202, 4.036, 5.185, 7.071, 9.068, 10.259, 12.042, 13.454, 15.620];用matlab计算在（4.5,4.5）的双三次插值，正确的代码为（）

解矩阵方程：设[tex=8.571x3.643]59Kc+wt/w/lXK3ncoinsUQ2jYDI0FWaxU84o1BsTZqQPJsS4C1t/DB2Pa2g/ei6MJbjbilww0H21C6SfLB2l+IlLmbgUi6MDPnXyaeVsTzT8xeNt9QFKY/Jt0VJTbImy[/tex]，[tex=7.071x3.643]HJammJSW6EkxRCluDbVEjsRhwsc/PMB9Ef6wRcUE+9WSLVeTqk4XrSLpNbUwUM8KA1S+9MRdqVdbdqsW0CV/Xgc9zkcawnuKxWeh7xG0K7w=[/tex]，求[tex=0.929x1.286]uswT/CEcOIwMpCvTz/zeaA==[/tex]使[tex=3.714x1.286]K+fSbsS3sMnLaOoXAZeadw==[/tex]。

设矩阵 [tex=0.857x1.0]KGogyvwDAIJf/iL0H/9wjg==[/tex] 满足[p=align:center][tex=7.357x1.357]u9jSEi7DRLjP/o8S468Hw0K7MAgDDec/FLUM/0S5ue4=[/tex] ，其中 [tex=10.286x3.929]3BT1BgBZQ5uJXxD5dg+w242BuIRgBBR2LgA3khxeCLgZAd31gcgM2zbNF82+AkQM11CEuSHvOJojWO/0ydl0N4RJXzgsIs4SsMyKVRuRMnQkmrYBVaPQUOOt9f4Obp5O[/tex]， [tex=7.071x3.643]UwKAx/AIX9lGAocRZ6Xn89D/yoa4kyQZaSfo+XYTZI7wNz2dmZGKvC3oDEJLi/ArFF3JZW/rlQHL2bdeISD2CrT0RiyFl9iW0xCZKzGEDu4=[/tex]，求矩阵 [tex=0.857x1.0]KGogyvwDAIJf/iL0H/9wjg==[/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)

下列式中错误的是： A: (∀x)(A(x)Úp(x)) Û (∀x)A(x)Ú (∀x)p(x) B: ($x)A(x) Ù p Û ($x)(A(x) Ù p ) C: (∀x)(A(x)ÚB(x)) Þ (∀x)A(x)Ú( ∀x)B(x) D: ($x)(A(x)ÙB(x)) Þ ($x)A(x)Ù( $x)B(x)

判断下列推证是否正确。 (∀x)(A(x)→B(x))⇔(∀x)(￢A(x)∨B(x)) ⇔(∀x)￢( A(x)∧￢B(x) ) ⇔￢(∃x) ( A(x)∧￢B(x) ) ⇔￢( (∃x)A(x)∧(∃x)￢B(x) ) ⇔￢(∃x)A(x)∨￢(∃x)￢B(x) ⇔￢(∃x)A(x)∨(∀x)B(x) ⇔(∃x)A(x)→(∀x)B(x)