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What is the real part of the complex number -2i?
Ah, what a lovely question! When we have a complex number like -2i, we can see that the real part is 0. You see, the real part is the coefficient of the term with the variable "i," and in this case, there isn't a real part, so it's simply 0. Just a happy little zero floating peacefully in the complex plane.
When the sum of the complex numbers 3 plus 2I and 6 - 4I is graphed in which quadrant does it lie?
3+2i + 6-4i = 9-2i The real part of this number is positive, therefore it lies in Q1 or Q4. The imaginary part is negative, therefore it is in Q3 or Q4. Q4 is the common possibility, therefore 9-2i is in Q4.
What is the imaginary number of square root of -4?
Either 2i or -2i, when squared equal -4.
What is a multiplicative inverse of an imaginary number?
The same as for a real number: 1 divided by the number.For example, the multiplicative inverse (or reciprocal) of 2i is 1 / 2i = -(1/2)i.
Is non-real numbers exist?
no, every number is a real number --- There are numbers that are not real numbers. They are called imaginary numbers, and have the property that when they are squared, the result is negative. The square root of -1 is called i, and the square root of any other negative number is i times the square root of the absolute value of the number. So the square root of -4 is 2i.
