在无限大自由空间中,已知平面电磁波的电场表达式为[img=214x30]180352cb9a5eb7d.png[/img]V/m,则磁场表达式为:
A: [img=218x29]180352cba6092f8.png[/img]
B: [img=232x29]180352cbb097f09.png[/img]
C: [img=215x30]180352cbbcd1548.png[/img]
D: [img=192x30]180352cbc6e9d62.png[/img]a[img=39x25]180352cbcf6a5f6.png[/img]
A: [img=218x29]180352cba6092f8.png[/img]
B: [img=232x29]180352cbb097f09.png[/img]
C: [img=215x30]180352cbbcd1548.png[/img]
D: [img=192x30]180352cbc6e9d62.png[/img]a[img=39x25]180352cbcf6a5f6.png[/img]
举一反三
- 在无限大自由空间中,已知平面电磁波的电场表达式为[img=214x30]1803a65ff42b80b.png[/img]V/m,则磁场表达式为: A: [img=218x29]1803a65ffe49e7f.png[/img] B: [img=232x29]1803a660089b47a.png[/img] C: [img=215x30]1803a6601360b82.png[/img] D: [img=192x30]1803a6601dc4f1d.png[/img]
- X~N(1,1), 密度函数为[img=37x25]18038fe689205b5.png[/img], 分布函数为F(x), 则( ) A: [img=198x25]18038fe690a03ee.png[/img] B: [img=101x25]18038fe69af96aa.png[/img] C: [img=67x25]18038fe6a3b8e5b.png[/img][img=118x25]18038fe6ab93d6f.png[/img] D: F(x)=F(-x)
- 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}
- 若f(x)+f(-x)=0, 则[img=95x39]17da608af452d96.jpg[/img]. 若f(x)=f(-x), 则 [img=170x38]17da60541207426.jpg[/img]
- 在无限大自由空间中,已知平面电磁波的电场表达式为:V/m,则磁场表达式为:( )[img=656x112]17a411e168b9d39.png[/img]