Preface: When I was reviewing today, I didn’t understand why the Fourier transform of the unit impulse function delta [n] was 1. After checking the information, it suddenly became clear. I believe that you who are in front of the screen have the same doubts as me after reading my next sharing. , will also suddenly become enlightened.
Online information, students can just look at the formulas drawn on the page I posted, that is, two formulas, if you have the basics You can understand it at a glance.
First formula:
Second formula (关键):
Okay, with the help of these two formulas, just take out a pen and paper and do a little deduction. Isn’t it very simple? Isn’t this one click and three consecutive steps?