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even if you can't see it.... the number is real. but question to that, what's the number?

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Clearly, the above answer was provided by someone who had no knowledge of the complex field.

A real number cannot be a pure imaginary number, nor can it contain any part that is imaginary.

In the context of the coordinate plane, the real numbers can be seen as the x-axis, the pure imaginary numbers form the y-axis excluding the origin. Complex numbers are all the point in the four quadrants.

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Q: Can a real number be a pure imaginary number?
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