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Which is purely an imaginary number?

Sagot :

A purely imaginary number is a number that can be written in the form \( bi \), where \( b \) is a real number and \( i \) is the imaginary unit defined by \( i = \sqrt{-1} \).

Examples of purely imaginary numbers include:

- \( 3i \)

- \( -7i \)

- \( \frac{1}{2}i \)

- \( 2\sqrt{2}i \)

These numbers are purely imaginary because they do not have a real part (the coefficient of \( i \) is zero or non-existent). Therefore, any number in the form \( bi \) where \( b \neq 0 \) is purely imaginary.Answer:

Step-by-step explanation:

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