At what points (x, y, z) in space is the function continuous?[img=368x117]1803229635cda43.png[/img]
A: [img=158x25]180322964081f92.png[/img]
B: [img=159x25]180322964a26107.png[/img]
C: [img=158x25]1803229654dadbb.png[/img]
D: [img=80x25]180322965e5ca6a.png[/img]
A: [img=158x25]180322964081f92.png[/img]
B: [img=159x25]180322964a26107.png[/img]
C: [img=158x25]1803229654dadbb.png[/img]
D: [img=80x25]180322965e5ca6a.png[/img]
举一反三
- 谓词公式([img=14x16]17da56eeb417e47.png[/img]x)P(x,y)∧(([img=8x14]17da6393381999d.jpg[/img]x)Q(x,z)→([img=12x15]17da639354b492d.png[/img]x)([img=8x14]17da6393381999d.jpg[/img]y)R(x,y,z))中量词[img=15x16]17da56ee93ee35a.png[/img]x的辖域是( ) 未知类型：{'options': ['([img=15x16]17da56ee93ee35a.png[/img]x)Q(x,z)→([img=8x14]17da563f348435c.jpg[/img]x)([img=15x16]17da56ee93ee35a.png[/img]y)R(x,y,z))', ' Q(x,z)→([img=15x16]17da56ee93ee35a.png[/img]y)R(x,y,z)', ' Q(x,z)→([img=12x15]17da639354b492d.png[/img]x)([img=8x14]17da6393381999d.jpg[/img]y)R(x,y,z)', ' Q(x,z)'], 'type': 102}
- 谓词公式([img=8x14]17e0a83a4157352.jpg[/img]x)P(x,y)∧([img=8x14]17e0a83a35505d4.jpg[/img]x)(Q(x,z)→([img=8x14]17e0a83a4157352.jpg[/img]x)([img=8x14]17e0a83a4157352.jpg[/img]y)R(x,y,z))中量词[img=8x14]17e0a83a35505d4.jpg[/img]x的辖域是() 未知类型：{'options': ['(Q(x,z)→([img=8x14]17e0a83a4157352.jpg[/img]x)([img=8x14]17e0a83a4157352.jpg[/img]y)R(x,y,z))', ' Q(x,z)，R(x,y,z)', ' Q(x,z)→([img=8x14]17e0a83a4157352.jpg[/img]y)R(x,y,z)', ' Q(x,z)'], 'type': 102}
- 设随机变量(X,Y)的概率密度函数为[img=282x73]18032ceadce22a4.png[/img],F(x,y)是(X,Y)在(x,y)点的分布函数，则以下选项正确的是 A: [img=158x25]18032ceae9515e0.png[/img] B: [img=175x25]18032ceaf4e7654.png[/img] C: [img=116x25]18032ceafdb09be.png[/img] D: [img=149x25]18032ceb070b5b7.png[/img] E: [img=175x25]18032ceb106ed9b.png[/img] F: [img=149x25]18032ceb1968bdb.png[/img] G: [img=134x25]18032ceb22e4b1d.png[/img] H: [img=116x25]18032ceb2ba9d91.png[/img] I: [img=116x25]18032ceb3478823.png[/img]
- 设随机变量(X,Y)的概率密度函数为[img=282x73]1802d3b87f886ed.png[/img],F(x,y)是(X,Y)在(x,y)点的分布函数，则以下选项正确的是 A: [img=158x25]1802d3b887c2d6a.png[/img] B: [img=175x25]1802d3b89023808.png[/img] C: [img=116x25]1802d3b89a1a88f.png[/img] D: [img=149x25]1802d3b8a2b3c14.png[/img] E: [img=175x25]1802d3b8ab2503b.png[/img] F: [img=149x25]1802d3b8b3de5d3.png[/img] G: [img=134x25]1802d3b8bc330fe.png[/img] H: [img=116x25]1802d3b8c43d207.png[/img] I: [img=116x25]1802d3b8cd521f9.png[/img]
- 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}