Question

Which of the following, if any, is the multiplicative inverse of 9/11?
A) A) 1 2/9
B) B) 9/11
C) C) The multiplicative inverse does not exist.
D) D) None of the other choices.

Answer 1

On your calculator, do 9/11

Take that decimal and raise it to -1

Answer 2

Then convert that number back into fraction

Answer 3

so then -.0909 back into a fraction

Answer 4

9/11 should equal .8181

raising that to -1 should equal 1.222222

Answer 5

Which is 61/50

Answer 6

It doesn't exist

Answer 7

A number and its multiplicative inverse have a product of 1.

Multiplicative inverse of a number is another name for reciprocal.

The reciprocal of 9/11 DOES exist.

What times 9/11 = 1?

Answer 8

@schamp2010 What is the reciprocal of 9/11?

Answer 9

-11/9

Answer 10

Sorry about that Schamp. I was thinking of something else.

Answer 11

You have additive inverse and multiplicative inverse mixed up.

Answer 12

A number and its additive inverse add to zero. Example: 5 + (-5) = 0 so -5 is the additive inverse of 5.

Answer 13

But, we are not doing that. We are doing multiplicative inverses.

Answer 14

Answer should be a number that will cancel the numerator and denominator

\[\frac{ 9 }{ 11 }*\frac{ x }{ y}\]

Answer 15

So the answer isn't there

Answer 16

It is there. What number divided by ( will give you 1?

Answer 17

Multiplicative inverses multiply to ONE.

@schamp2010 I SEE the answer.

If you tell me what the reciprocal of 9/11 is, I will show you that the answer is listed among the options.

Answer 18

\[\frac{ x }{ 11 }=1 and \frac{ y }{ 9 }\]

Answer 19

11/9 right?

Answer 20

Yes

Answer 21

Postive 11/9

Answer 22

So then the answer is a?

Answer 23

You listed A) is 12/9. Did you copy thast correctly?

Answer 24

1 2/9

Answer 25

A) 1 2/9
is 1 and 2/9. Change 1 to 9/9.
Add 9/9 + 2/9 to get 11/9 which is the multiplicative inverse of 9/11.