以下关于二元函数的四个命题,(1)f(x,y)在点[img=42x19]17e448ecfed3326.jpg[/img]处连续; (2)f(x,y)在点[img=42x19]17e448ecfed3326.jpg[/img]处的两个偏导数连续;(3)f(x,y)在点[img=42x19]17e448ecfed3326.jpg[/img]处可微; (4)f(x,y)在点[img=42x19]17e448ecfed3326.jpg[/img]处的两个偏导数存在;它们之间的关系为( )(这里[img=42x17]17e448ed09cd36d.jpg[/img]表示由命题P可推出命题Q)
未知类型:{'options': ['(2)[img=14x9]17e448ed142d298.jpg[/img](3)[img=14x9]17e448ed142d298.jpg[/img](1)', ' (3)[img=14x9]17e448ed142d298.jpg[/img](2)[img=14x9]17e448ed142d298.jpg[/img](1)', ' (3)[img=14x9]17e448ed142d298.jpg[/img](2)[img=14x9]17e448ed142d298.jpg[/img](4)', ' (2)[img=14x9]17e448ed142d298.jpg[/img](3)[img=14x9]17e448ed142d298.jpg[/img](4)'], 'type': 102}
未知类型:{'options': ['(2)[img=14x9]17e448ed142d298.jpg[/img](3)[img=14x9]17e448ed142d298.jpg[/img](1)', ' (3)[img=14x9]17e448ed142d298.jpg[/img](2)[img=14x9]17e448ed142d298.jpg[/img](1)', ' (3)[img=14x9]17e448ed142d298.jpg[/img](2)[img=14x9]17e448ed142d298.jpg[/img](4)', ' (2)[img=14x9]17e448ed142d298.jpg[/img](3)[img=14x9]17e448ed142d298.jpg[/img](4)'], 'type': 102}
举一反三
- 以下关于二元函数的四个命题,(1)f(x,y)在点[img=42x19]17da587796e586c.jpg[/img]处连续; (2)f(x,y)在点[img=42x19]17da587796e586c.jpg[/img]处的两个偏导数连续;(3)f(x,y)在点[img=42x19]17da587796e586c.jpg[/img]处可微; (4)f(x,y)在点[img=42x19]17da587796e586c.jpg[/img]处的两个偏导数存在;它们之间的关系为( )(这里[img=42x17]17da5877ad340eb.jpg[/img]表示由命题P可推出命题Q) 未知类型:{'options': ['(2)[img=14x9]17da5877b6c4a81.jpg[/img](3)[img=14x9]17da5877b6c4a81.jpg[/img](1)', '(3)[img=14x9]17da5877b6c4a81.jpg[/img](2)[img=14x9]17da5877b6c4a81.jpg[/img](1)', '(3)[img=14x9]17da5877b6c4a81.jpg[/img](2)[img=14x9]17da5877b6c4a81.jpg[/img](4)', '(2)[img=14x9]17da5877b6c4a81.jpg[/img](3)[img=14x9]17da5877b6c4a81.jpg[/img](4)'], 'type': 102}
- 以下关于二元函数的四个命题,(1)f(x,y)在点[img=42x19]17e0c875af41a44.jpg[/img]处连续; (2)f(x,y)在点[img=42x19]17e0c875af41a44.jpg[/img]处的两个偏导数连续;(3)f(x,y)在点[img=42x19]17e0c875af41a44.jpg[/img]处可微; (4)f(x,y)在点[img=42x19]17e0c875af41a44.jpg[/img]处的两个偏导数存在;它们之间的关系为( )(这里[img=42x17]17e0c875bcc15dc.jpg[/img]表示由命题P可推出命题Q) 未知类型:{'options': ['(2)[img=14x9]17e0c875c9f9f4c.jpg[/img](3)[img=14x9]17e0c875c9f9f4c.jpg[/img](1)', ' (3)[img=14x9]17e0c875c9f9f4c.jpg[/img](2)[img=14x9]17e0c875c9f9f4c.jpg[/img](1)', ' (3)[img=14x9]17e0c875c9f9f4c.jpg[/img](2)[img=14x9]17e0c875c9f9f4c.jpg[/img](4)', ' (2)[img=14x9]17e0c875c9f9f4c.jpg[/img](3)[img=14x9]17e0c875c9f9f4c.jpg[/img](4)'], 'type': 102}
- 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}
- 考虑二元函数的下面四条性质,则有( )(1)f(x,y)在点[img=52x25]1803d3469e57b15.png[/img]处连续 (2)f(x,y)在点[img=52x25]1803d3469e57b15.png[/img]处两个偏导数连续(3)f(x,y)在点[img=52x25]1803d3469e57b15.png[/img]处可微 (4)f(x,y)在点[img=52x25]1803d3469e57b15.png[/img]处两个偏导数存在 A: [img=125x25]1803d346c03fe8a.png[/img] B: [img=125x25]1803d346c8da475.png[/img] C: [img=125x25]1803d346d101a9e.png[/img] D: [img=125x25]1803d346d9681c2.png[/img]
- 考虑二元函数的下面四条性质,则有( )(1)f(x,y)在点[img=52x25]1803d33f049b721.png[/img]处连续 (2)f(x,y)在点[img=52x25]1803d33f049b721.png[/img]处两个偏导数连续(3)f(x,y)在点[img=52x25]1803d33f049b721.png[/img]处可微 (4)f(x,y)在点[img=52x25]1803d33f049b721.png[/img]处两个偏导数存在 A: [img=125x25]1803d33f258c65d.png[/img] B: [img=125x25]1803d33f2f5d801.png[/img] C: [img=125x25]1803d33f3820bdb.png[/img] D: [img=125x25]1803d33f40873ef.png[/img]