As you may guess from my other questions i am a student so pardon me any ignorance and guide me to the truth. Thanks
In this exercise from an exam i was given that transfer function with poles and zeros. I was asked to draw the modulus and the "UHD imagive below the Transfer function" image was my answer.
I know that when you encounter a zero, you "go down" and when you encounter a pole you "go up" in the graph. When you encounter both "aligned", you get a cero as they cancel each other.
The answer from the teacher was that the maximum, which is 1, is
at pi/8 (and
at pi/4, because
at pi/4 (and
-pi/4) he draw the minimum.
Why is that? and what i did got wrong or missed in my understanding?
Thanks for answer.
EDIT: Here i add another example from a recent exam. I would like if someone could do a brief/short explanation in how to properly draw it and what should i know or notice.
The question is the same, but i lack proper understanding of it.