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Math Forum » Discussions » Professional Associations » nyshsmath

Topic: review and question
Replies: 13   Last Post: Jan 27, 2013 11:46 AM

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Adam Wittenstein

Posts: 84
Registered: 12/3/04
Re: review and question
Posted: Jan 21, 2013 11:07 AM
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Just as a real number can be rational or irrational, a complex number can be real or imaginary. Any complex number that is not real is imaginary. For example, 5 + 2i is imaginary and complex, just as 1/2 is rational and real. However, 5 + 2i is not "pure imaginary", as a pure imaginary number must in the form bi (or 0+bi) with b not equal to 0.

Adam Wittenstein
Saint Demetrios School

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