Question

How do you find `abs( 2i )`?

Answer 1

`|2i|=2`

Explanation:

`|a+bi|` for a complex number `a+bi` is given by

`sqrt(a^2+b^2)`.

Hence, `|2i|=|0+2i|=sqrt(0^2+2^2)=sqrt(0+4)=2`