A: [img=500x332]1803293768735c7.png[/img]
B: [img=500x332]180329378053998.png[/img]
C: [img=983x655]18032937ef03ff9.png[/img]
D: [img=500x375]180329380839d99.png[/img]
举一反三
- 下列公式中（ ）不是命题 。 A: ([img=10x19]180361811d22e4e.png[/img]x)P(x) B: ([img=10x19]18036181259b0de.png[/img]x)P(x) C: ([img=10x19]180361811d22e4e.png[/img]x)(P(x)[img=12x16]18036181351b766.png[/img]p(y)) D: ([img=10x19]18036181259b0de.png[/img]x)([img=10x19]18036181259b0de.png[/img]y)(P(x)[img=18x11]180361814f231a2.png[/img]p(y))
- 下列公式中（ ）不是命题 。 A: ([img=10x19]1802fc729227794.png[/img]x)P(x) B: ([img=10x19]1802fc729a47f04.png[/img]x)P(x) C: ([img=10x19]1802fc729227794.png[/img]x)(P(x)[img=12x16]1802fc72ab56bf4.png[/img]p(y)) D: ([img=10x19]1802fc729a47f04.png[/img]x)([img=10x19]1802fc729a47f04.png[/img]y)(P(x)[img=18x11]1802fc72c373eac.png[/img]p(y))
- 下列公式中（ ）不是命题 。 A: ([img=10x19]180323d46bb2977.png[/img]x)P(x) B: ([img=10x19]180323d47572f03.png[/img]x)P(x) C: ([img=10x19]180323d46bb2977.png[/img]x)(P(x)[img=12x16]180323d48718b32.png[/img]p(y)) D: ([img=10x19]180323d47572f03.png[/img]x)([img=10x19]180323d47572f03.png[/img]y)(P(x)[img=18x11]180323d4a05a5c9.png[/img]p(y))
- 令F(x):x是有理数,G(x):x是实数。将命题“所有的有理数都是实数,但有的有实数不是有理数”符号化为() 未知类型：{'options': ['17e0a83a4157352.jpgx(F(x)∧G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)[img=14x9]17e0a73094b5dcf.jpg[/img][img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)[img=14x9]17e0a73094b5dcf.jpg[/img]G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)∧[img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)∧G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)∧[img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)[img=14x9]17e0a73094b5dcf.jpg[/img]G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)[img=14x9]17e0a73094b5dcf.jpg[/img][img=10x11]17e0a839b915354.jpg[/img]F(x))'], 'type': 102}
- 下列的推理结构中哪个是正确的推理形式()。 未知类型：{'options': ['([img=8x14]17e4385a99bb660.jpg[/img] x)P(x) ∧ ([img=8x14]17e4385a99bb660.jpg[/img]x)Q(x) → ([img=8x14]17e4385a99bb660.jpg[/img]x)(P(x) ∧Q(x))', ' ([img=8x14]17e4385a99bb660.jpg[/img] x)P(x) → ([img=8x14]17e4385a99bb660.jpg[/img]x)(P(x) ∧ Q(x))', ' ([img=8x14]17e4385a99bb660.jpg[/img]x)(P(x) ∨ Q(x)) → ([img=8x14]17e4385a99bb660.jpg[/img]x)P(x) ∨([img=8x14]17e4385a99bb660.jpg[/img]x)Q(x)', ' ([img=8x14]17e4385a99bb660.jpg[/img]x)(P(x)∨ Q(x)) → ([img=8x14]17e4385a99bb660.jpg[/img] x)P(x) ∧ ([img=8x14]17e4385a99bb660.jpg[/img] x)Q(x)'], 'type': 102}
内容
- 0
下列的推理结构中哪个是正确的推理形式()。 未知类型：{'options': ['([img=8x14]17e4385aa223929.jpg[/img]x)(P(x) ∨Q(x)) → ([img=8x14]17e4385aa223929.jpg[/img]x)P(x) ∧ ([img=8x14]17e4385aa223929.jpg[/img]x)Q(x)', ' ([img=8x14]17e4385aa223929.jpg[/img]x)(P(x) ∨ Q(x)) → ([img=8x14]17e4385aa223929.jpg[/img]x)P(x) ∨ ([img=8x14]17e4385aa223929.jpg[/img]x)Q(x)', ' ([img=8x14]17e4385aa223929.jpg[/img]x)P(x) → ([img=8x14]17e4385aa223929.jpg[/img]x)(P(x) ∧Q(x))', ' ([img=8x14]17e4385aa223929.jpg[/img]x)P(x) ∧([img=8x14]17e4385aa223929.jpg[/img]x)Q(x) → ([img=8x14]17e4385aa223929.jpg[/img]x)(P(x) ∧ Q(x))'], 'type': 102}
- 1
下列等值式中正确的是( )。 未知类型：{'options': ['( [img=8x14]17e4385a99bb660.jpg[/img]x)(P(x)→B) ≡ ([img=8x14]17e4385a99bb660.jpg[/img]x)P(x)→B', ' ( [img=8x14]17e4385aa223929.jpg[/img]x)(B→Q(x)) ≡B→([img=8x14]17e4385aa223929.jpg[/img]x)Q(x)', ' ( [img=8x14]17e4385aa223929.jpg[/img]x)(P(x)→B) ≡ ([img=8x14]17e4385aa223929.jpg[/img]x)P(x)→B', ' ( [img=8x14]17e4385aa223929.jpg[/img]x)(B→Q(x)) ≡B→ ([img=8x14]17e4385a99bb660.jpg[/img]x)Q(x)'], 'type': 102}
- 2
Which of the following propositions is false,set A = {x,x is an integer and[img=60x23]1803a1c6eebb7a3.png[/img]} ? ( ) A: [img=113x25]1803a1c6f77ce06.png[/img] B: [img=139x25]1803a1c7001fe79.png[/img] C: [img=51x22]1803a1c70863f61.png[/img] D: {x|x is an integer and |x| 4}[img=33x22]1803a1c711a7c63.png[/img]
- 3
Which of the following propositions is false,set A = {x,x is an integer and [img=60x23]1803a1c503ffa04.png[/img]} ? ( ) A: [img=113x25]1803a1c50cc3162.png[/img] B: [img=139x25]1803a1c514e60ea.png[/img] C: [img=51x22]1803a1c51dd52ef.png[/img] D: {x|x is an integer and |x| <4} [img=33x22]1803a1c525cf1bd.png[/img]
- 4
下列等值式不正确的是： 未知类型：{'options': ['', '┐([img=10x19]17de6020f4c375c.png[/img]x)A [img=18x11]17de60210176264.png[/img]([img=10x19]17de60210dea9b9.png[/img] x)┐A', '(∃x)(A(x)∧B(x))[img=18x11]17de60210176264.png[/img] (∃x)A(x)∧(∃ x)B(x)', '(∀x)(∀y)(A(x)→B(y))[img=18x11]17de60210176264.png[/img] (∀x)A(x)→(∀y)B(y)'], 'type': 102}