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BUILT-IN MATHEMATICA SYMBOL
Rationalize
Rationalize[x]
converts an approximate number x to a nearby rational with small denominator.
Rationalize[x, dx]
yields the rational number with smallest denominator that lies within dx of x.
Details
- Rationalize[x, dx] works with exact numbers x.
- Rationalize[x] yields x unchanged if there is no rational number close enough to x to satisfy the condition
, with 
chosen to be 
. - Rationalize[x, 0] converts any x to rational form. »
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