Which of the following is a complex number? -7 mc007-1.jpg 4 + 9i mc007-2.jpg

Which of the following is a complex number?

-7

mc007-1.jpg

4 + 9i

mc007-2.jpg

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1 Answer

The only expression containing i=√(-1) is the third choice. √3 and π are irrational but real; -7 is real and rational; so 4+9i is the only complex number because it has an imaginary component.

by Top Rated User (1.1m points)

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