I thought that the high-frequency circuit was undoubtedly a book in the sky, but it turned out that this semester's online book copying exam was very stable, and basically the concepts were turned to the original questions in the book.

But what the hell is the signal and system this afternoon!!

Zero state response? Zero input, shock?

Knowing the practice of Fourier forward and negative transformations, it is nothing more than Fourier characteristics to solve, but there is no template at all!!

Integral properties, differential properties? In the end, I thought about it for a long time and didn't know how to set the basic spectrum F(jw).

How do you find convolution for two gate functions?

Two Symbolic Functions to Find Convolution?

In the end, I used the Fourier transform formula to fool a wave, until the last second, the spectrum of the last unilateral exponent, and finally made it, but the photo was not submitted.

Now I just hope to honestly give a 50 points and don't fail the course......

God, the theory is too hard, and instead of Fourier and the Laplace transform that you didn't dabble in, you still use linear algebra and mathematical statistics to stone me.

(⋟﹏⋞)

The mentality is fried, and there have been no four thousand words a day for three days.

I want to play games. (T_T)

"There is a Lady in Heaven"**The signal and system are really difficult to hit by hand, please wait a while,

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