Which of the following is the conjugate of a complex number with −1 as the real part and 3 as the imaginary part?

−1 − 3i

−1 + 3i

3i + 1

3i − 1

Question

Which of the following is the conjugate of a complex number with −1 as the real part and 3 as the imaginary part?

 −1 − 3i

 −1 + 3i

 3i + 1

 3i − 1

anonymous · Answer

I have no clue how to do this @ganeshie8 @kirbykirby

kirbykirby · Answer

If you have a complex number $a+ib$, then $a$ is the real part, and $b$ is the imaginary part.

anonymous · Answer

so it would be -1 + 3i?

kirbykirby · Answer

yeah $\checkmark\_\checkmark$

kirbykirby · Answer

oh wait the question is not done oops!

kirbykirby · Answer

they want the conjugate of that

kirbykirby · Answer

the conjugate is $a+ib$ is $a-ib$

anonymous · Answer

don't you flip the signs to get conjugate

kirbykirby · Answer

yeah

anonymous · Answer

so it's a

kirbykirby · Answer

yeah ;) sorry hehe!

anonymous · Answer

ok thanks again, i have one more but it will take a while to write out

anonymous · Answer

i'll make a new thread

kirbykirby · Answer

all right , yw