Question

Which property of addition is shown below?

If x = a + bi and y = –a – bi, x + y = 0.

a. commutative property
b. identity property
c. associative property
d. inverse property

Thinking a?

Answer 1

I don't think so.a would just be something like a+b=b+a

Should be inverse, D.
a+-a=0 and bi-bi=0.

-a is the inverse of a and -bi is the inverse of bi