[tex=9.214x3.929]Uyz5s0rmQIddjb5Jc2T/Yd6m/Ul4M6w7nfuzR8KKgs4puZ3SmJ3tOOsdnxXja9vMjzcKgCsV348W5FVXflxgKBoNIym+EGepSUg3qnuNw4R2NNaWeWPGGVFcyHh9+ISf[/tex]

[tex=9.214x3.929]Uyz5s0rmQIddjb5Jc2T/Yd6m/Ul4M6w7nfuzR8KKgs4puZ3SmJ3tOOsdnxXja9vMjzcKgCsV348W5FVXflxgKBoNIym+EGepSUg3qnuNw4R2NNaWeWPGGVFcyHh9+ISf[/tex]

[tex=9.214x3.929]Uyz5s0rmQIddjb5Jc2T/Yd6m/Ul4M6w7nfuzR8KKgs4puZ3SmJ3tOOsdnxXja9vMjzcKgCsV348W5FVXflxgKBoNIym+EGepSUg3qnuNw4R2NNaWeWPGGVFcyHh9+ISf[/tex]

[tex=9.214x3.929]Uyz5s0rmQIddjb5Jc2T/Yd6m/Ul4M6w7nfuzR8KKgs4puZ3SmJ3tOOsdnxXja9vMjzcKgCsV348W5FVXflxgKBoNIym+EGepSUg3qnuNw4R2NNaWeWPGGVFcyHh9+ISf[/tex]

计算[tex=9.214x3.929]TIwZYBkNsy31H1RNd/OloJ7eHkqP4TEGd+o+BA4BiTGR+d+GuRcwFtYsHExPj79jJ9icLHKPB7ApAgUDG1k/51MtB1R6VvX7n+3CLfum6s4iw1CFyYxPqn0Shrkf2rzh[/tex]

计算[tex=9.214x3.929]TIwZYBkNsy31H1RNd/OloJ7eHkqP4TEGd+o+BA4BiTGR+d+GuRcwFtYsHExPj79jJ9icLHKPB7ApAgUDG1k/51MtB1R6VvX7n+3CLfum6s4iw1CFyYxPqn0Shrkf2rzh[/tex]

用适当的方法求下列行列式:[tex=9.214x3.929]TIwZYBkNsy31H1RNd/OloJ7eHkqP4TEGd+o+BA4BiTGR+d+GuRcwFtYsHExPj79jJ9icLHKPB7ApAgUDG1k/51MtB1R6VvX7n+3CLfum6s4iw1CFyYxPqn0Shrkf2rzh[/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)