## brokenbells83 3 years ago what is the multiplicative inverse of -1/9

1. myininaya

Let b be the multiplicative inverse of a such ab=1

2. myininaya

S the multiplicative inverse of -1/9 is b and a is -1/9 Solve for the multiplicative inverse of -1/9

3. myininaya

In other words, solve for b

4. myininaya

ab=1 a*b=1 -1/9 * b=1 <---solve for b Can you do this?

5. brokenbells83

you lost me big time e.0???

6. myininaya

Your question ask us to find the multiplicative inverse of a I'm calling that multiplicative inverse b. The multiplicative identity is 1. If a and b are multiplicative inverses of each other, then the product of a and b is 1.

7. myininaya

ab=1 -1/9 * b=1 You need to solve this for b in other words.

8. myininaya

If you don't know how to solve equations, then you can always remember to take the opposite of the reciprocal. Just so you know 0 doesn't have a multiplicative inverse.

9. myininaya

What is the reciprocal of -1/9?

10. myininaya

To find the reciprocal just switch the numerator and denominator for each other.

11. myininaya

Do you know what I mean?

12. ParthKohli

Opposite of the reciprocal? Multiplicative inverse IS reciprocal.

13. myininaya

Oops. I'm thinking of lines that are perpendicular. I'm sorry.

14. myininaya

Just flip it. lol.

15. ParthKohli

:)

16. myininaya

But still ab=1 then a and b are multiplicative inverses of each other