试用矩阵行的初等变换将矩阵[tex=14.071x4.929]QN0fTQbn6M33pU3gx/S2sj5ZDcSFkXfnDcaKCOeHbKN/pWkR7uTs2Q7x26foFgz64VmS2PFIQPjUFIurSec8Kh2oxRBuQSvCnp5ulXsatfIVdrGBmHVxnWoibuoSJVYnxVZlljjruRqpQPdCYcfd/KJTEfKHnJcO2Kcvk06kFiWoyr1sBDkn+rQOIp1GMaHA[/tex]先化为行阶梯形矩阵,再进一步化为行最简形矩阵.
试用矩阵行的初等变换将矩阵[tex=14.071x4.929]QN0fTQbn6M33pU3gx/S2sj5ZDcSFkXfnDcaKCOeHbKN/pWkR7uTs2Q7x26foFgz64VmS2PFIQPjUFIurSec8Kh2oxRBuQSvCnp5ulXsatfIVdrGBmHVxnWoibuoSJVYnxVZlljjruRqpQPdCYcfd/KJTEfKHnJcO2Kcvk06kFiWoyr1sBDkn+rQOIp1GMaHA[/tex]先化为行阶梯形矩阵,再进一步化为行最简形矩阵.
设行列式[tex=14.071x4.929]TIwZYBkNsy31H1RNd/OloEJx1gxX+YSeWDKCM1HaOHlx+qr/AtweqRuuJnX3isr4YZT7il6LPr4EILmGLTnCLfaMytsks5MvON/uWkistZp/Cl7u6oVv1R2A89zLK1K03vlXGCOSwK7wCi72dE1RXNnEO1e9ZskOJd4TA2N1QpWZnTtRebSDT65gS5QBLUiaQVCemoYydZ16CnEg+y5D7x8YgBGmfHIeoZOdyX6pEzE=[/tex]为[tex=1.857x1.357]sBGRsVJ0Y3fPPi7d5ztPoA==[/tex],则方程[tex=3.143x1.357]GaUU+prLnDPZRkTgFIz5aw==[/tex]的根的个数为( )。 未知类型:{'options': ['1', '2', '3', '4'], 'type': 102}
设行列式[tex=14.071x4.929]TIwZYBkNsy31H1RNd/OloEJx1gxX+YSeWDKCM1HaOHlx+qr/AtweqRuuJnX3isr4YZT7il6LPr4EILmGLTnCLfaMytsks5MvON/uWkistZp/Cl7u6oVv1R2A89zLK1K03vlXGCOSwK7wCi72dE1RXNnEO1e9ZskOJd4TA2N1QpWZnTtRebSDT65gS5QBLUiaQVCemoYydZ16CnEg+y5D7x8YgBGmfHIeoZOdyX6pEzE=[/tex]为[tex=1.857x1.357]sBGRsVJ0Y3fPPi7d5ztPoA==[/tex],则方程[tex=3.143x1.357]GaUU+prLnDPZRkTgFIz5aw==[/tex]的根的个数为( )。 未知类型:{'options': ['1', '2', '3', '4'], 'type': 102}
记行列式[tex=14.071x4.929]Uyz5s0rmQIddjb5Jc2T/YZhK7kg+Ear9bZUPUbHi14Ht29sEwk99f5iQ/QbShNecY5I9qi9wi+0MnumbnJfUzFCfdcjPKSjuHHlDd4ZMUu/GC6PoNEP7ud8rZ8cNOSY6el0jRojVIzvrkc4H1FLepI6VyR3t4v2Jeuv1QA6T5f8t+GPkF9DsDhk7FhCQiIAiunVXDDgeok7OQlklGtsoP2CJp7dKlHZzgjs9aD/Zuv0=[/tex]为[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex],则方程[tex=3.714x1.357]65B6ryUjJi4PhOvbjiu/QQ==[/tex] 的根的个数为( )(A)1; (B)2; (C)3; (D)4.
记行列式[tex=14.071x4.929]Uyz5s0rmQIddjb5Jc2T/YZhK7kg+Ear9bZUPUbHi14Ht29sEwk99f5iQ/QbShNecY5I9qi9wi+0MnumbnJfUzFCfdcjPKSjuHHlDd4ZMUu/GC6PoNEP7ud8rZ8cNOSY6el0jRojVIzvrkc4H1FLepI6VyR3t4v2Jeuv1QA6T5f8t+GPkF9DsDhk7FhCQiIAiunVXDDgeok7OQlklGtsoP2CJp7dKlHZzgjs9aD/Zuv0=[/tex]为[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex],则方程[tex=3.714x1.357]65B6ryUjJi4PhOvbjiu/QQ==[/tex] 的根的个数为( )(A)1; (B)2; (C)3; (D)4.
记行列式[tex=14.071x4.929]Uyz5s0rmQIddjb5Jc2T/YZhK7kg+Ear9bZUPUbHi14Ht29sEwk99f5iQ/QbShNecY5I9qi9wi+0MnumbnJfUzFCfdcjPKSjuHHlDd4ZMUu/GC6PoNEP7ud8rZ8cNOSY6el0jRojVIzvrkc4H1FLepI6VyR3t4v2Jeuv1QA6T5f8t+GPkF9DsDhk7FhCQiIAiunVXDDgeok7OQlklGtsoP2CJp7dKlHZzgjs9aD/Zuv0=[/tex]为[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex],则方程[tex=3.714x1.357]65B6ryUjJi4PhOvbjiu/QQ==[/tex] 的根的个数为( )(A)1; (B)2; (C)3; (D)4.
记行列式[tex=14.071x4.929]Uyz5s0rmQIddjb5Jc2T/YZhK7kg+Ear9bZUPUbHi14Ht29sEwk99f5iQ/QbShNecY5I9qi9wi+0MnumbnJfUzFCfdcjPKSjuHHlDd4ZMUu/GC6PoNEP7ud8rZ8cNOSY6el0jRojVIzvrkc4H1FLepI6VyR3t4v2Jeuv1QA6T5f8t+GPkF9DsDhk7FhCQiIAiunVXDDgeok7OQlklGtsoP2CJp7dKlHZzgjs9aD/Zuv0=[/tex]为[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex],则方程[tex=3.714x1.357]65B6ryUjJi4PhOvbjiu/QQ==[/tex] 的根的个数为( )(A)1; (B)2; (C)3; (D)4.
记行列式[tex=14.071x4.929]Uyz5s0rmQIddjb5Jc2T/YZhK7kg+Ear9bZUPUbHi14Ht29sEwk99f5iQ/QbShNecY5I9qi9wi+0MnumbnJfUzFCfdcjPKSjuHHlDd4ZMUu/GC6PoNEP7ud8rZ8cNOSY6el0jRojVIzvrkc4H1FLepI6VyR3t4v2Jeuv1QA6T5f8t+GPkF9DsDhk7FhCQiIAiunVXDDgeok7OQlklGtsoP2CJp7dKlHZzgjs9aD/Zuv0=[/tex]为[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex],则方程[tex=3.714x1.357]65B6ryUjJi4PhOvbjiu/QQ==[/tex] 的根的个数为( )(A)1; (B)2; (C)3; (D)4.
记行列式[tex=14.071x4.929]Uyz5s0rmQIddjb5Jc2T/YZhK7kg+Ear9bZUPUbHi14Ht29sEwk99f5iQ/QbShNecY5I9qi9wi+0MnumbnJfUzFCfdcjPKSjuHHlDd4ZMUu/GC6PoNEP7ud8rZ8cNOSY6el0jRojVIzvrkc4H1FLepI6VyR3t4v2Jeuv1QA6T5f8t+GPkF9DsDhk7FhCQiIAiunVXDDgeok7OQlklGtsoP2CJp7dKlHZzgjs9aD/Zuv0=[/tex]为[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex],则方程[tex=3.714x1.357]65B6ryUjJi4PhOvbjiu/QQ==[/tex] 的根的个数为( )(A)1; (B)2; (C)3; (D)4.
记行列式[tex=14.071x4.929]Uyz5s0rmQIddjb5Jc2T/YZhK7kg+Ear9bZUPUbHi14Ht29sEwk99f5iQ/QbShNecY5I9qi9wi+0MnumbnJfUzFCfdcjPKSjuHHlDd4ZMUu/GC6PoNEP7ud8rZ8cNOSY6el0jRojVIzvrkc4H1FLepI6VyR3t4v2Jeuv1QA6T5f8t+GPkF9DsDhk7FhCQiIAiunVXDDgeok7OQlklGtsoP2CJp7dKlHZzgjs9aD/Zuv0=[/tex]为[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex],则方程[tex=3.714x1.357]65B6ryUjJi4PhOvbjiu/QQ==[/tex] 的根的个数为( )(A)1; (B)2; (C)3; (D)4.
记行列式[tex=14.071x4.929]Uyz5s0rmQIddjb5Jc2T/YZhK7kg+Ear9bZUPUbHi14Ht29sEwk99f5iQ/QbShNecY5I9qi9wi+0MnumbnJfUzFCfdcjPKSjuHHlDd4ZMUu/GC6PoNEP7ud8rZ8cNOSY6el0jRojVIzvrkc4H1FLepI6VyR3t4v2Jeuv1QA6T5f8t+GPkF9DsDhk7FhCQiIAiunVXDDgeok7OQlklGtsoP2CJp7dKlHZzgjs9aD/Zuv0=[/tex]为[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex],则方程[tex=3.714x1.357]65B6ryUjJi4PhOvbjiu/QQ==[/tex] 的根的个数为( )(A)1; (B)2; (C)3; (D)4.
记行列式[tex=14.071x4.929]Uyz5s0rmQIddjb5Jc2T/YZhK7kg+Ear9bZUPUbHi14Ht29sEwk99f5iQ/QbShNecY5I9qi9wi+0MnumbnJfUzFCfdcjPKSjuHHlDd4ZMUu/GC6PoNEP7ud8rZ8cNOSY6el0jRojVIzvrkc4H1FLepI6VyR3t4v2Jeuv1QA6T5f8t+GPkF9DsDhk7FhCQiIAiunVXDDgeok7OQlklGtsoP2CJp7dKlHZzgjs9aD/Zuv0=[/tex]为[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex],则方程[tex=3.714x1.357]65B6ryUjJi4PhOvbjiu/QQ==[/tex] 的根的个数为( )(A)1; (B)2; (C)3; (D)4.
记行列式[tex=14.071x4.929]Uyz5s0rmQIddjb5Jc2T/YZhK7kg+Ear9bZUPUbHi14Ht29sEwk99f5iQ/QbShNecY5I9qi9wi+0MnumbnJfUzFCfdcjPKSjuHHlDd4ZMUu/GC6PoNEP7ud8rZ8cNOSY6el0jRojVIzvrkc4H1FLepI6VyR3t4v2Jeuv1QA6T5f8t+GPkF9DsDhk7FhCQiIAiunVXDDgeok7OQlklGtsoP2CJp7dKlHZzgjs9aD/Zuv0=[/tex]为[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex],则方程[tex=3.714x1.357]65B6ryUjJi4PhOvbjiu/QQ==[/tex] 的根的个数为( )(A)1; (B)2; (C)3; (D)4.
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)