Question

A complex number is a number of the form a + bi, where:

A. a is a real number and bi is an imaginary number.
B. a and bi are imaginary numbers.
C. a and bi are real numbers.
D. a is an imaginary number and bi is a real number.

Answer 1

What is that?!

Answer 2

lol nothing, i really need help with the question tho

Answer 3

Please avoid posting content like that.

Answer 4

Ok, so this is kind of a trick question:

Answer 5

alright

Answer 6

We express complex numbers as a+bi.

Answer 7

right

Answer 8

In this case, A and B are real.

Answer 9

*a *b

Answer 10

real + real*imaginary.

Answer 11

So B and D are wrong.

Answer 12

But real*imaginary is also imaginary.

Answer 13

So C is wrong.

Answer 14

if you know that \(i\) is imaginary, then multiplying it times any real number \(b\) still is imaginary.

Answer 15

So A, right?

Answer 16

\(i=\sqrt{-1}\) you know this, right?

Answer 17

yes, A is correct, but I would like (if you don't mind) to gain understand on this, if you aren't sure you can fully comprehend the question.

Answer 18

gain *understanding*

Answer 19

idk who to give the medal too, ima give it to liamschumm because he was first to reply, but thank you both for answering

Answer 20

I don't really care about medals.... sorry to hear that all people care about is medals.

Answer 21

Have a nice day, Arock and Solomon!