 |
BUILT-IN MATHEMATICA SYMBOL
CountRoots
CountRoots[poly, x]
gives the number of real roots of the polynomial poly in x.
CountRoots[poly, {x, a, b}]
gives the number of roots between a and b.
Details
- CountRoots enumerates roots with multiplicities counted.
- Roots that lie exactly at
or 
are counted. - The limits a and b can be complex, in which case the range is taken to be a closed rectangle in the complex plane.
New in 6
