1.0 KiB
1.0 KiB
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| Complex Numbers Introduction |
Complex Numbers Introduction
A complex number is any number that can be expressed in the form of z = a + ib.
a is called the real part of the complex number, and b is called the imaginary part.
Note
A pure imaginary number or a pure real number is also a complex number.
Examples
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What is the real part of 2i+1? A. Real part : 1
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What is the imaginary part of 2 - 4i? A. Imaginary part : -4
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Is it a complex number z = 2i? A. Yes , because we can write this number as z = 0 + 2i.
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Is it a complex number z = 4? A. Yes , because we can write this number as z = 4 + 0i.