def __new__(cls, f, x, index=None, radicals=True, expand=True):
        return rootof(f, x, index=index, radicals=radicals, expand=expand)
Construct a new ``CRootOf`` object for ``k``-th root of ``f``.
dataset/ETHPy150Open sympy/sympy/sympy/polys/rootoftools.py/RootOf.__new__