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exact value

The true mathematical answer, computed with no approximation at all.

The exact value of a quantity is the mathematically precise answer -- $\sqrt2$ itself, not 1.41421356, and the true root of an equation, not an iterate that has merely gotten close to it.

Examples

$\pi$ , $\sqrt2$ , and $1/3$ are all exact values; a calculator's 3.14159265 for $\pi$ is not.

See also

approximate value

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