Core Pure - Complex Numbers (1) Flashcards
1
Q
What is the symbol used for the complex conjecture?
A
2
Q
How do you divide 2 complex numbers?
What is this called?
A
You multiply by the denominator’s complex conjecture
This is called realising the denominator
3
Q
For a complex number z what is the symbol for the moduls of z and how do you calculate it?
A
4
Q
What do you know about complex roots?
A
They occur in complex conjectures
5
Q
What is the complex congregate?
A
When you switch the sign of the i term in the complex number
6
Q
What are 2 commonly used results?
A
7
Q
When you have a quadratic (in normal form) with roots x=α,x=β what are a, b and c?
A
b = -(α+β)
c = αβ
8
Q
What is the argument of a complex number?
A
The angle which is formed with the real axis
9
Q
How do you calculate the argument of a complex number
A
For z = x+iy
arg(z)=arctan(y/x)
