SOLUTION: which number doesnt have a reciprocal a . -1 b . 0 c . 1/1000 d . 3

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Question 729727: which number doesnt have a reciprocal
a . -1
b . 0
c . 1/1000
d . 3
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Every number but 0 has a reciprocal.

Let's assume that 0 did have a reciprocal. If it did, then 0 = 0/1 turns into 1/0...BUT...dividing by zero is NOT defined. So 1/0 is undefined.

This means that 0 does NOT have a reciprocal.