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Earn +20 ptsQ: Where did the imaginary number symbol i come from?
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The symbol for imaginary numbers is?
An imaginary number is symbolized by the letter i
Can a number be imaginary but not pure imaginary?
Yes. The number 1 + i is imaginary but not pure imaginary, while 5i is pure imaginary.
Is the difference of a complex number and its conjugate a real imaginary or pure imaginary number?
It is a pure imaginary number.Since (a+bi)-(a-bi) = 2bi, it is a pure imaginary number (it has no real component).
Does the imaginary or real part come first when writing a complex number?
The standard written form of a complex number is to first write the real part of the number, and then write the imaginary part; e.g. x+yi or 3+7i.
Is -23 an imaginary number?
No, but √-23 is. An imaginary number is the square root of a negative number.
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