某放大电路的幅频特性如下图所示,则其电压增益的表达式为_____。[img=239x123]18030deff6b9e12.png[/img]
A: [img=218x82]18030df006d5f47.png[/img]
B: [img=218x88]18030df017f4d19.png[/img]
C: [img=216x82]18030df0296ec47.png[/img]
D: [img=216x88]18030df037a51e5.png[/img]
A: [img=218x82]18030df006d5f47.png[/img]
B: [img=218x88]18030df017f4d19.png[/img]
C: [img=216x82]18030df0296ec47.png[/img]
D: [img=216x88]18030df037a51e5.png[/img]
举一反三
- 某放大电路的幅频特性如下图所示,则其电压增益的表达式为_____。[img=239x123]18030de8df707d2.png[/img] A: [img=218x82]18030de8edb3a41.png[/img] B: [img=218x88]18030de8fc14243.png[/img] C: [img=216x82]18030de90a2ae32.png[/img] D: [img=216x88]18030de919a6284.png[/img]
- 某放大电路的幅频特性如下图所示,则其电压增益的表达式为_____。[img=239x123]18030ddf85146d4.png[/img] A: [img=218x82]18030ddf937da5f.png[/img] B: [img=218x88]18030ddfa3e8dfa.png[/img] C: [img=216x82]18030ddfb2a6749.png[/img] D: [img=216x88]18030ddfc415437.png[/img]
- 要求方程[img=69x27]1802e4da216c9dd.png[/img]的解,应使用命令 A: dsolve('Df=x^2') B: dsolve('Df==x^2') C: dsolve('Df=x^2',x) D: dsolve('Df==x^2',x)
- 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}