Question

(see picture)
Note that s=jw, where j is the unit imaginary number i

Answer 1

What happened between line 2&3 and between lines 3&4?

Answer 2

mod or magnitude of a complex number a +bi is
\(|a+bi|=\sqrt {a^2+b^2}\)

Answer 3

Did they forget to make it 1/(everything) in line 3?

Answer 4

the exponent should not be -1
it should be -1/2

Answer 5

they made it -1/2 in 2nd last step, so their answer is correct

Answer 6

ah, i see now

Answer 7

ok thanks. If I had just looked ahead of would have realized the mistakes XD

Answer 8

welcome ^_^

Answer 9

if you have any more doubts on this, you can ask :)

Answer 10

nope I'm fine, I thought I was forgetting some obvious complex number rule lol

Answer 11

good :)