Question

what is the inverse of 4/-9​

Answer 1

Additive inverse is 4/9
Multiplicative inverse is -9/4

Answer 2

To get the additive inverse of a postive number you put a minus in front of it and to get the additive inverse of a negative number, you remove the minus to make it a positive number. Yes it is , because {4/9 + -4 /9 } = {4/9+(-4/9)}=0/9=0 similarly , (-4/9 + 4/9 ) =0.