求解下列微分方程:[tex=13.714x5.214]fnpmC2J6JmQBLyo5NmGAz0fnVjAOwA7LuI4ne1+axK0yZDg/YfLRy3JoNmADbx8E91v6e408KXqYeZ/F9QVgA9SrxkuQPPxhLJDJqx0Hyi/rltgsdfCLuq22hAfnxd9z2tBvbWl+dfkMOthlP+2xH3MLQEK9XsJPsScIJFkEEQRHC+SPTJBsaGwMC2vqd6+RU7EoquJplWMWP6uhn9tOtg==[/tex],[tex=13.286x1.286]/1oWWXWQltYWR7rOzO1DEsOe54Xl89UGGP2KSCzzylhIuMnv0aOdw6/5wBnE4ZND[/tex]。
求解下列微分方程:[tex=13.714x5.214]fnpmC2J6JmQBLyo5NmGAz0fnVjAOwA7LuI4ne1+axK0yZDg/YfLRy3JoNmADbx8E91v6e408KXqYeZ/F9QVgA9SrxkuQPPxhLJDJqx0Hyi/rltgsdfCLuq22hAfnxd9z2tBvbWl+dfkMOthlP+2xH3MLQEK9XsJPsScIJFkEEQRHC+SPTJBsaGwMC2vqd6+RU7EoquJplWMWP6uhn9tOtg==[/tex],[tex=13.286x1.286]/1oWWXWQltYWR7rOzO1DEsOe54Xl89UGGP2KSCzzylhIuMnv0aOdw6/5wBnE4ZND[/tex]。
按照方案二的效率指标计算,车公里产量为()吨公里/车公里。 A: 2.758 B: 2.891 C: 4.125 D: 5.214
按照方案二的效率指标计算,车公里产量为()吨公里/车公里。 A: 2.758 B: 2.891 C: 4.125 D: 5.214
设 [tex=4.643x1.214]6m6IpLK9nxKlloS9uQjB0nuL8Bfo83HknXeeHZE8fTo=[/tex] 为独立随机变量序列,且均服从参数为 [tex=0.643x1.0]+D9NhKovEP8INGz+KZnr1A==[/tex] 的指数分布,则( ). 未知类型:{'options': ['[tex=13.714x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW3XOO6IdwGqZJo/UFwaW43UJidGoMck4Tr+afQtGl1GmIUTBsiC6ukwZloTft28OVE9jW3ut9HI1N9tEOcvkrqVQ9FpF6LmXiNWlCfuJcWQM2wtbxNrFpUsjrl4evwxvNw=[/tex];', '[tex=14.286x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW2pltwBBZlvkLgFzrrNrjClOiUpmp84TWntMIxPtMVgGaIoHn3S0NVRV3Nu374V+dfJfPNpHnR1XUUEhYJLen2ML1zd6RRQ89pjNnVpuxZkjg==[/tex];', '[tex=13.714x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW3XOO6IdwGqZJo/UFwaW43UJidGoMck4Tr+afQtGl1GmM0otl7/ftYiYbfAmS7OAFjY9VGLkGg7y41mhfVeOp2vppe0YBplmd20NRcHmC8OBZ4e8izzN0cdVws2G8R0XiY=[/tex];', '[tex=14.286x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW2pltwBBZlvkLgFzrrNrjClOiUpmp84TWntMIxPtMVgGXN/tNLTOjhoLpwjnJENMajwP22EU1JR2RzL52wkJVqTc+oZOufkjF9OuDL3/4wwKQ==[/tex].'], 'type': 102}
设 [tex=4.643x1.214]6m6IpLK9nxKlloS9uQjB0nuL8Bfo83HknXeeHZE8fTo=[/tex] 为独立随机变量序列,且均服从参数为 [tex=0.643x1.0]+D9NhKovEP8INGz+KZnr1A==[/tex] 的指数分布,则( ). 未知类型:{'options': ['[tex=13.714x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW3XOO6IdwGqZJo/UFwaW43UJidGoMck4Tr+afQtGl1GmIUTBsiC6ukwZloTft28OVE9jW3ut9HI1N9tEOcvkrqVQ9FpF6LmXiNWlCfuJcWQM2wtbxNrFpUsjrl4evwxvNw=[/tex];', '[tex=14.286x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW2pltwBBZlvkLgFzrrNrjClOiUpmp84TWntMIxPtMVgGaIoHn3S0NVRV3Nu374V+dfJfPNpHnR1XUUEhYJLen2ML1zd6RRQ89pjNnVpuxZkjg==[/tex];', '[tex=13.714x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW3XOO6IdwGqZJo/UFwaW43UJidGoMck4Tr+afQtGl1GmM0otl7/ftYiYbfAmS7OAFjY9VGLkGg7y41mhfVeOp2vppe0YBplmd20NRcHmC8OBZ4e8izzN0cdVws2G8R0XiY=[/tex];', '[tex=14.286x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW2pltwBBZlvkLgFzrrNrjClOiUpmp84TWntMIxPtMVgGXN/tNLTOjhoLpwjnJENMajwP22EU1JR2RzL52wkJVqTc+oZOufkjF9OuDL3/4wwKQ==[/tex].'], 'type': 102}
设 [tex=4.643x1.214]6m6IpLK9nxKlloS9uQjB0nuL8Bfo83HknXeeHZE8fTo=[/tex] 为独立随机变量序列,且均服从参数为 [tex=0.643x1.0]+D9NhKovEP8INGz+KZnr1A==[/tex] 的指数分布,则( ). 未知类型:{'options': ['[tex=13.714x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW3XOO6IdwGqZJo/UFwaW43UJidGoMck4Tr+afQtGl1GmIUTBsiC6ukwZloTft28OVE9jW3ut9HI1N9tEOcvkrqVQ9FpF6LmXiNWlCfuJcWQM2wtbxNrFpUsjrl4evwxvNw=[/tex];', '[tex=14.286x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW2pltwBBZlvkLgFzrrNrjClOiUpmp84TWntMIxPtMVgGaIoHn3S0NVRV3Nu374V+dfJfPNpHnR1XUUEhYJLen2ML1zd6RRQ89pjNnVpuxZkjg==[/tex];', '[tex=13.714x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW3XOO6IdwGqZJo/UFwaW43UJidGoMck4Tr+afQtGl1GmM0otl7/ftYiYbfAmS7OAFjY9VGLkGg7y41mhfVeOp2vppe0YBplmd20NRcHmC8OBZ4e8izzN0cdVws2G8R0XiY=[/tex];', '[tex=14.286x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW2pltwBBZlvkLgFzrrNrjClOiUpmp84TWntMIxPtMVgGXN/tNLTOjhoLpwjnJENMajwP22EU1JR2RzL52wkJVqTc+oZOufkjF9OuDL3/4wwKQ==[/tex].'], 'type': 102}
设 [tex=4.643x1.214]6m6IpLK9nxKlloS9uQjB0nuL8Bfo83HknXeeHZE8fTo=[/tex] 为独立随机变量序列,且均服从参数为 [tex=0.643x1.0]+D9NhKovEP8INGz+KZnr1A==[/tex] 的指数分布,则( ). 未知类型:{'options': ['[tex=13.714x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW3XOO6IdwGqZJo/UFwaW43UJidGoMck4Tr+afQtGl1GmIUTBsiC6ukwZloTft28OVE9jW3ut9HI1N9tEOcvkrqVQ9FpF6LmXiNWlCfuJcWQM2wtbxNrFpUsjrl4evwxvNw=[/tex];', '[tex=14.286x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW2pltwBBZlvkLgFzrrNrjClOiUpmp84TWntMIxPtMVgGaIoHn3S0NVRV3Nu374V+dfJfPNpHnR1XUUEhYJLen2ML1zd6RRQ89pjNnVpuxZkjg==[/tex];', '[tex=13.714x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW3XOO6IdwGqZJo/UFwaW43UJidGoMck4Tr+afQtGl1GmM0otl7/ftYiYbfAmS7OAFjY9VGLkGg7y41mhfVeOp2vppe0YBplmd20NRcHmC8OBZ4e8izzN0cdVws2G8R0XiY=[/tex];', '[tex=14.286x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW2pltwBBZlvkLgFzrrNrjClOiUpmp84TWntMIxPtMVgGXN/tNLTOjhoLpwjnJENMajwP22EU1JR2RzL52wkJVqTc+oZOufkjF9OuDL3/4wwKQ==[/tex].'], 'type': 102}
设 [tex=4.643x1.214]6m6IpLK9nxKlloS9uQjB0nuL8Bfo83HknXeeHZE8fTo=[/tex] 为独立随机变量序列,且均服从参数为 [tex=0.643x1.0]+D9NhKovEP8INGz+KZnr1A==[/tex] 的指数分布,则( ). 未知类型:{'options': ['[tex=13.714x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW3XOO6IdwGqZJo/UFwaW43UJidGoMck4Tr+afQtGl1GmIUTBsiC6ukwZloTft28OVE9jW3ut9HI1N9tEOcvkrqVQ9FpF6LmXiNWlCfuJcWQM2wtbxNrFpUsjrl4evwxvNw=[/tex];', '[tex=14.286x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW2pltwBBZlvkLgFzrrNrjClOiUpmp84TWntMIxPtMVgGaIoHn3S0NVRV3Nu374V+dfJfPNpHnR1XUUEhYJLen2ML1zd6RRQ89pjNnVpuxZkjg==[/tex];', '[tex=13.714x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW3XOO6IdwGqZJo/UFwaW43UJidGoMck4Tr+afQtGl1GmM0otl7/ftYiYbfAmS7OAFjY9VGLkGg7y41mhfVeOp2vppe0YBplmd20NRcHmC8OBZ4e8izzN0cdVws2G8R0XiY=[/tex];', '[tex=14.286x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW2pltwBBZlvkLgFzrrNrjClOiUpmp84TWntMIxPtMVgGXN/tNLTOjhoLpwjnJENMajwP22EU1JR2RzL52wkJVqTc+oZOufkjF9OuDL3/4wwKQ==[/tex].'], 'type': 102}
设 [tex=4.643x1.214]6m6IpLK9nxKlloS9uQjB0nuL8Bfo83HknXeeHZE8fTo=[/tex] 为独立随机变量序列,且均服从参数为 [tex=0.643x1.0]+D9NhKovEP8INGz+KZnr1A==[/tex] 的指数分布,则( ). 未知类型:{'options': ['[tex=13.714x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW3XOO6IdwGqZJo/UFwaW43UJidGoMck4Tr+afQtGl1GmIUTBsiC6ukwZloTft28OVE9jW3ut9HI1N9tEOcvkrqVQ9FpF6LmXiNWlCfuJcWQM2wtbxNrFpUsjrl4evwxvNw=[/tex];', '[tex=14.286x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW2pltwBBZlvkLgFzrrNrjClOiUpmp84TWntMIxPtMVgGaIoHn3S0NVRV3Nu374V+dfJfPNpHnR1XUUEhYJLen2ML1zd6RRQ89pjNnVpuxZkjg==[/tex];', '[tex=13.714x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW3XOO6IdwGqZJo/UFwaW43UJidGoMck4Tr+afQtGl1GmM0otl7/ftYiYbfAmS7OAFjY9VGLkGg7y41mhfVeOp2vppe0YBplmd20NRcHmC8OBZ4e8izzN0cdVws2G8R0XiY=[/tex];', '[tex=14.286x5.214]8vJYfWnQRBqJWdmg/yoyrFXY9mkM5FxBz35AlgFEaW2pltwBBZlvkLgFzrrNrjClOiUpmp84TWntMIxPtMVgGXN/tNLTOjhoLpwjnJENMajwP22EU1JR2RzL52wkJVqTc+oZOufkjF9OuDL3/4wwKQ==[/tex].'], 'type': 102}
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)
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( $x)B(x)
下列式中错误的是: A: (∀x)(A(x)Úp(x)) Û (∀x)A(x)Ú (∀x)p(x) B: ($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)
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)