下面广义积分中( )是收敛的.
A: [img=123x52]1803ba305761f33.png[/img]
B: [img=139x52]1803ba3062affc8.png[/img]
C: [img=139x52]1803ba306d4e3e9.png[/img]
D: [img=137x52]1803ba3078e6db5.png[/img]
A: [img=123x52]1803ba305761f33.png[/img]
B: [img=139x52]1803ba3062affc8.png[/img]
C: [img=139x52]1803ba306d4e3e9.png[/img]
D: [img=137x52]1803ba3078e6db5.png[/img]
举一反三
- 下面广义积分中( )是收敛的. A: [img=123x52]18031b4f090971a.png[/img] B: [img=139x52]18031b4f148e5ee.png[/img] C: [img=139x52]18031b4f1f7181c.png[/img] D: [img=137x52]18031b4f2a92dfc.png[/img]
- 设[img=121x51]1803281c887762a.png[/img][img=118x51]1803281c90e8df4.png[/img]已知AB=BA，则x = ____
- 图中，已知BA的坐标方位角，导线各转角，试推算出A→1、1→2的坐标方位角。[img=567x454]17e448b31905d58.jpg[/img] A: 107°44′52″ B: 287°44′52″ C: 68°28′20″ D: 147°01′24″
- 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}
- 已知随机变量X的分布函数为[img=136x49]1803b69024c8270.png[/img] ，则X的均值和方差分别为 A: E(X)=2, D(X)=4 B: E(X)=4, D(x)=2 C: [img=162x43]1803b6902cd8bfb.png[/img] D: [img=162x43]1803b69034d9ffd.png[/img]