Concepts in complex numbers

The reflection of a complex number z=x+iy in the real axis mirror is called the____________.

• Polar form of z

• Modulus of z

• Conjugate of z

• Argument of z

8. The conjugate of  $7-5i$  is...

•  $-7-5i$  

•  $-7+5i$  

•  $7-5i$  

•  $7+5i$  

what is the conjugate?

• a
• b
• c
• d

What is the conjugate of the complex number (2/3) + (4/5)i?

• (2/3) - (4/5)i

• -(2/3) + (4/5)i

• (2/3) + (4/5)i

• -(2/3) - (4/5)i

What is the conjugate of the complex number 4 + 12i?

• 4 + 12i

• 8 - 6i

• 4 - 12i

• 16 - 144i

If  $z\ =\ 1+\iota$ , then the multiplicative inverse of  $z^2$   is:

•  $1-\iota$  

•  $-\frac{\iota}{2}$  

•  $\frac{\iota}{2}$  

•  $2\iota$  

What is the conjugate of

i

• i

• -i

• 1

• -1

Find the conjugate of the complex number (3 + 7i).

• 3 - 7i

• 3 + 7

• 7 - 3i

• 3 + 7i

What is the conjugate of 5 - 2i?

• 5 + 2i

• -5 - 2i

• 5 - 2i

• -5 + 2i

What is the conjugate of 4i?

• 4i

• 4 + 4i

• 4-4i

• -4i