加减法运算电路如图11所示,设运算放大器是理想的,则输出电压和输入电压的关系式为 。[img=255x212]1802df7a19ad09e.jpg[/img]
A: [img=159x19]1802df7a25a9ed5.jpg[/img]
B: [img=163x20]1802df7a31be100.jpg[/img]
C: [img=178x22]1802df7a3c5ba59.jpg[/img]
D: [img=177x21]1802df7a477c5cc.jpg[/img]
A: [img=159x19]1802df7a25a9ed5.jpg[/img]
B: [img=163x20]1802df7a31be100.jpg[/img]
C: [img=178x22]1802df7a3c5ba59.jpg[/img]
D: [img=177x21]1802df7a477c5cc.jpg[/img]
举一反三
- 加减法运算电路如图11所示,设运算放大器是理想的,则输出电压和输入电压的关系式为 。[img=255x212]1802ebb3c839d9b.jpg[/img] A: [img=159x19]1802ebb3d3c8f14.jpg[/img] B: [img=163x20]1802ebb3dedcee6.jpg[/img] C: [img=178x22]1802ebb3ea3487a.jpg[/img] D: [img=177x21]1802ebb3f52e1ea.jpg[/img]
- 加减法运算电路如图11所示,设运算放大器是理想的,则输出电压和输入电压的关系式为 。[img=255x212]18032ed64196d3e.jpg[/img] A: [img=159x19]18032ed64cf5efe.jpg[/img] B: [img=163x20]18032ed657dda62.jpg[/img] C: [img=178x22]18032ed66495593.jpg[/img] D: [img=177x21]18032ed66f07f00.jpg[/img]
- 加减法运算电路如图11所示,设运算放大器是理想的,则输出电压和输入电压的关系式为 。[img=255x212]18032dca3a81214.jpg[/img] A: [img=159x19]18032dca45e0f09.jpg[/img] B: [img=163x20]18032dca4f850d1.jpg[/img] C: [img=178x22]18032dca59b4704.jpg[/img] D: [img=177x21]18032dca6586143.jpg[/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)
- 设X,Y为两个随机变量,且[img=179x25]1803395d555effc.png[/img] , [img=226x25]1803395d61f1a43.png[/img] ,则[img=143x25]1803395d6f00057.png[/img]= ( ). A: 1/7 B: 3/7 C: 4/7 D: 5/7