What is the reciprocal of 0?

1/0
there is none
infinity
0/1

I know that it is either the first or the last...but I'm not sure which...

Question

What is the reciprocal of 0? 

1/0
there is none
infinity
0/1

I know that it is either the first or the last...but I'm not sure which...

anonymous · Answer

there is none

beccab003 · Answer

What?

anonymous · Answer

Every number has a reciprocal except 0 (1/0 is undefined)

beccab003 · Answer

Are you sure?

isaiah.feynman · Answer

Yes. But in limits such an expression would be infinite (Calculus).

beccab003 · Answer

Okay. But for algebra it would be undefined? Thanks!

anonymous · Answer

I explained myself you can either take it or leave it

anonymous · Answer

@Isaiah.Feynman this is algebra not calculus

isaiah.feynman · Answer

@Shay17 Relax. You are right for basic algebra.

anonymous · Answer

So then leave the question alone and don't respond

isaiah.feynman · Answer

And yes for this level of mathematics such an expression is undefined.@BeccaB003

beccab003 · Answer

Thanks! Can you help me with one that is similar?

beccab003 · Answer

The reciprocal of 5 is:
-1/5
There is none
1/5
-5

beccab003 · Answer

Isn't the reciprocal something times something equals that number? so like 3*3 equals 9? The reciprocal of 9 is 3. Is that what it means?

anonymous · Answer

1/5

isaiah.feynman · Answer

Nope. The reciprocal is "1 over"

anonymous · Answer

5= 5/1 so reciprocal is 1/5

beccab003 · Answer

oh okay. Sorry I couldn't remember what a reciprocal was. So, for the other question wouldn't it be 1/0? I know that that means it is undefined but still that is how it looks..

anonymous · Answer

except for zero i said

beccab003 · Answer

but wouldn't that be how it looks like to be undefined?

beccab003 · Answer

Plus the answer says: there is none. when it is just undefined..

anonymous · Answer

just know that zero has no reciprocal

anonymous · Answer

there is none is the same as undefined :/

beccab003 · Answer

okay...are you sure?

anonymous · Answer

positive

isaiah.feynman · Answer

@Hero

anonymous · Answer

what grade are you in ? @BeccaB003

beccab003 · Answer

9th

anonymous · Answer

Ohh

beccab003 · Answer

I just wanted to be doubly sure...sorry

beccab003 · Answer

I didn't tage hero

beccab003 · Answer

someone else tagged hero...

beccab003 · Answer

What do you think hero?

mathmale · Answer

Regarding "Isn't the reciprocal something times something equals that number? so like 3*3 equals 9? The reciprocal of 9 is 3. Is that what it means?"  NO.  Given quantity ' a ', the reciprocal of ' a ' is  1/a.