求 函数的傅氏积分：[tex=10.286x3.357]ZECRU93qHJI3rUoGf+vkZ2EQvJSs89/NzcCP/YxST4WI4SjW8twlXhwVxpmkF/o0rpQhuwyxRw80BKwSmc7inE+GkELbWLYdMSYQqcFws7X0IlFTY2I7Vqqw/6FClYD1[/tex]
求 函数的傅氏积分：[tex=10.286x3.357]ZECRU93qHJI3rUoGf+vkZ2EQvJSs89/NzcCP/YxST4WI4SjW8twlXhwVxpmkF/o0rpQhuwyxRw80BKwSmc7inE+GkELbWLYdMSYQqcFws7X0IlFTY2I7Vqqw/6FClYD1[/tex]
求下列函数的傅氏积分[p=align:center][tex=10.286x3.357]yA9VxGgWFghS/CdxQGqmXdPGs8s2F17ID5zWQ3tBPXXdJ1WukABrLyLnSIP2m9lW6XJxnKY2Comky3e02MEWX/4qLDF7YJMXHgkmLX9W9Jz0IjkJf0ccRVyUF682MBy6[/tex]
求下列函数的傅氏积分[p=align:center][tex=10.286x3.357]yA9VxGgWFghS/CdxQGqmXdPGs8s2F17ID5zWQ3tBPXXdJ1WukABrLyLnSIP2m9lW6XJxnKY2Comky3e02MEWX/4qLDF7YJMXHgkmLX9W9Jz0IjkJf0ccRVyUF682MBy6[/tex]
设星形线的方程为 [tex=10.286x3.357]7EJHVCtO2IWq3KpdB+jQsvszz1BFziNKVYepn1Tc7If+OLkFm70SmBv0/rGZShL77R4+pNFwU7wi5pqulinkPGuD2suDFkmwIEhBNqZvKPL317Us4W1+wbRwh7JR0i7q[/tex]试求：它的弧长.
设星形线的方程为 [tex=10.286x3.357]7EJHVCtO2IWq3KpdB+jQsvszz1BFziNKVYepn1Tc7If+OLkFm70SmBv0/rGZShL77R4+pNFwU7wi5pqulinkPGuD2suDFkmwIEhBNqZvKPL317Us4W1+wbRwh7JR0i7q[/tex]试求：它的弧长.
图示压杆体系中，弹簧支座刚度为[img=64x44]180379b3117202b.png[/img]，则该体系的临界荷载为kl的（ ）倍。[img=3924x1660]180379b32884d13.jpg[/img] A: 0.411 B: 1 C: 1.645 D: 3.357
图示压杆体系中，弹簧支座刚度为[img=64x44]180379b3117202b.png[/img]，则该体系的临界荷载为kl的（ ）倍。[img=3924x1660]180379b32884d13.jpg[/img] A: 0.411 B: 1 C: 1.645 D: 3.357
图示压杆体系中，弹簧支座刚度为[img=64x44]1802df48734317e.png[/img]，则该体系的临界荷载为kl的（ ）倍。[img=3924x1660]1802df4888c0309.jpg[/img] A: 0.411 B: 1 C: 1.645 D: 3.357
图示压杆体系中，弹簧支座刚度为[img=64x44]1802df48734317e.png[/img]，则该体系的临界荷载为kl的（ ）倍。[img=3924x1660]1802df4888c0309.jpg[/img] A: 0.411 B: 1 C: 1.645 D: 3.357
下列函数是偶函数的是[input=type:blank,size:4][/input]. 未知类型：{'options': ['[tex=9.286x3.643]ACpG7W/lXiEwdW69ASBj84wONCGbv23xhwGIyFqTAsumsaLLaOPLp6FpSW1UMX0Gm9K8o2gFAXE/UMAJ+wDpH3PFOHNgeXW6RZ6HOAzSmCw=[/tex]', '[tex=9.857x3.643]ACpG7W/lXiEwdW69ASBj87+7IhEyPgxjnozNiWY+F5FCVmrVGthpvvMnxaob+Qb92pGfzCtBsvaCm/l84CFPpAbVRWSXR6JPS51zzh4KLNieV5xnhsANuHgo3gX+tNap[/tex]', '[tex=9.857x2.786]ACpG7W/lXiEwdW69ASBj8+UX23UMM1v4mbi6Bqi0jQvZD0yceFCIz0aJCtdQpNGzCZuXhpycnbRah08fSfOqLpJ4+/bM+gPUFkxHgj9U0dxuFJakOSknrm/WiL9upuNN[/tex]', '[tex=10.286x3.357]ACpG7W/lXiEwdW69ASBj847RnTfW++jmgxeX7+sUfQe8mpHoVdKqKpMbpOAwtjiDWPy55ooLR3toASLM6P+ClY0A7q1Lq/u4C+yi59wzcDNKlIVoF2bvzSptVIw3Cw9H[/tex]'], 'type': 102}
下列函数是偶函数的是[input=type:blank,size:4][/input]. 未知类型：{'options': ['[tex=9.286x3.643]ACpG7W/lXiEwdW69ASBj84wONCGbv23xhwGIyFqTAsumsaLLaOPLp6FpSW1UMX0Gm9K8o2gFAXE/UMAJ+wDpH3PFOHNgeXW6RZ6HOAzSmCw=[/tex]', '[tex=9.857x3.643]ACpG7W/lXiEwdW69ASBj87+7IhEyPgxjnozNiWY+F5FCVmrVGthpvvMnxaob+Qb92pGfzCtBsvaCm/l84CFPpAbVRWSXR6JPS51zzh4KLNieV5xnhsANuHgo3gX+tNap[/tex]', '[tex=9.857x2.786]ACpG7W/lXiEwdW69ASBj8+UX23UMM1v4mbi6Bqi0jQvZD0yceFCIz0aJCtdQpNGzCZuXhpycnbRah08fSfOqLpJ4+/bM+gPUFkxHgj9U0dxuFJakOSknrm/WiL9upuNN[/tex]', '[tex=10.286x3.357]ACpG7W/lXiEwdW69ASBj847RnTfW++jmgxeX7+sUfQe8mpHoVdKqKpMbpOAwtjiDWPy55ooLR3toASLM6P+ClY0A7q1Lq/u4C+yi59wzcDNKlIVoF2bvzSptVIw3Cw9H[/tex]'], 'type': 102}
某信源发送端有两个符号:[tex=9.5x1.357]LQHhJFqSkhLFS5QJ8xYXNbanCTpIU0o4sOu1YZo3Cn/e9ZeU9bzj4ev/Zjbr8cYa[/tex]，每秒发出一个符号。接收端有三种符号: [tex=4.857x1.286]NShpPae40faZ0Vk8En8k4A==[/tex]，转移概率知阵[tex=10.286x3.357]BJ01inipONhLpj7h0EHN8nR/o79PNEsjAxEkxw/e5z7UFQVv3TUfHbbgapzYzcMF7xne8TmX5R4rE4Cfcc4WBAryoyCNKaKcqdhFNdr9SgK2t5KgrGaIpSlLFQZeRuWm[/tex] 计算接收端的平均不确定性;
某信源发送端有两个符号:[tex=9.5x1.357]LQHhJFqSkhLFS5QJ8xYXNbanCTpIU0o4sOu1YZo3Cn/e9ZeU9bzj4ev/Zjbr8cYa[/tex]，每秒发出一个符号。接收端有三种符号: [tex=4.857x1.286]NShpPae40faZ0Vk8En8k4A==[/tex]，转移概率知阵[tex=10.286x3.357]BJ01inipONhLpj7h0EHN8nR/o79PNEsjAxEkxw/e5z7UFQVv3TUfHbbgapzYzcMF7xne8TmX5R4rE4Cfcc4WBAryoyCNKaKcqdhFNdr9SgK2t5KgrGaIpSlLFQZeRuWm[/tex] 计算接收端的平均不确定性;
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}
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)
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)