Question

Xjw____

想問這題解法 謝謝🙏

4.設a、B∈C,若|a|=1
9
答:2~5
B
=3+4i,試求|a-之值。
α

Answer 1

qn

β = (3+4i)α
α-β = α-(3+4i)α = α(-2-4i)
|α-β| = |α(-2-4i)|
= |α| × |-2-4i|
= 2 × |1+2i| = 2√5