Hello from MrBillDoesMath!
Answer:
- (1/2)
Discussion:
Let the "additive inverse" be x. By definition of additive inverse, x,
x + (1/2) = 0.
Subtract (1/2) from both sides to get
x + (1/2) - (1/2) = 0 - (1/2) =>
x + 0 = - (1/2) =>
x = - (1/2)
Thank you,
MrB