In a complex number written as a + bi, which part represents the imaginary component?

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Multiple Choice

In a complex number written as a + bi, which part represents the imaginary component?

Explanation:
The part that carries the imaginary unit i is the imaginary component. In a + bi, the term bi is the imaginary part, since it contains i; the real part is just a, with no i. The modulus and argument describe size and direction in the complex plane, not the imaginary portion. So the imaginary component is bi, and the label for that concept is the imaginary part.

The part that carries the imaginary unit i is the imaginary component. In a + bi, the term bi is the imaginary part, since it contains i; the real part is just a, with no i. The modulus and argument describe size and direction in the complex plane, not the imaginary portion. So the imaginary component is bi, and the label for that concept is the imaginary part.

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