An nth root finds a number that gives the original value when raised to n.
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An nth root finds a number that gives the original value when raised to n.
| Input | What it means |
|---|---|
| Number | The number to test or transform; use the integer or real-number domain stated in the formula. |
| Radical degree (n) | Use the measured or stated value for this item, with the unit or category shown beside the field. |
The fourth root of 81 is 3; the cube root of −27 is −3.
Check an nth-root operation before using it in a longer expression.
Keep the original input precision through the calculation and round the final answer to the precision you need. Rounding an intermediate result can change later steps.
Check the operation, units, signs and rounding first. Equivalent fractions or expressions can look different while representing the same value.