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Reciprocal
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To get the reciprocal of a number, just divide 1 by the number
Example: the reciprocal of 2 is 1/2 (half)
Every number has a reciprocal except 0 (1/0 is undefined)
It is shown as 1/x, or x-1
If you multiply a number by its reciprocal you get 1
Example: 3 times 1/3 equals 1
Also called the "Multiplicative Inverse"
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