For the function $${{\sin z} \over {{z^3}}}$$ of a complex variable z, the point z = 0 is

The polynomial $$\,p\left( x \right) = {x^5} + x + 2\,\,$$ has

Identity the Newton $$-$$ Raphson iteration scheme for the finding the square root of $$2$$

Let $$j\, = \,\sqrt { - 1} $$. Then one value of $${j^j}$$ is