Question

Which of the following is the conjugate of a complex number with 2 as the real part and 7 as the imaginary part?

a. 2 + 7i
b. -2 - 7i
c. -2 + 7i
d. 2 - 7i

Answer 1

First of all... do you know what the conjugate is?

Answer 2

A conjugate is just a change in the second term, so D.

Answer 3

change of signs*

Answer 4

The complex conjugate of a + bi is a – bi, and similarly the complex conjugate of a – bi is a + bi. This consists of changing the sign of the imaginary part of a complex number. The real part is left unchanged.

Answer 5

@lowcard2 ... with that being said, do you know what the answer would be? (without looking at the answer Krazete gave you... lol)