matematik 1c matematik 4 matematik 5

Imaginary numbers

A solution to the simple second-degree equation

x2 + 1 =0

can not be found along the line of real-numbers.

Therefore it was necessary to invent a fictive number i such that i2=-1.

i.e. the imaginary numbers making it possible to take the square root of negative numbers.

They are represented along an axis horizontal to the axis of real numbers.

A combination of a real number and a imaginary number is called a complex number.

z = 2  + 3i.

Av mattelararen

Licentiate of Philosophy in atomic Physics
Master of Science in Physics

2 svar på ”Imaginary numbers”

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