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If the coefficient of i is not zero then the number is not real.
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∙ 9y ago
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How do you tell a real number?
It has no imaginary part. A complex number is of the form a + bi where a and b are real numbers, and i = √-1. A real number has b = 0.
How can you tell which part of a complex number is the real part and which is the imaginary part?
The imaginary part is expressed as a product of i(square root of negative one), typically following a plus sign, so that the complex number has the form a + bi, with "a" the real part and "bi" the imaginary part.
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