Question

By the method of finding unit digit and tens digit of cube root, find the cube root of $-68921.$

Answer 1

Cube root of $-68921$ is that,

$\begin{array}{c}\sqrt[3]{3-68921}\\ ={\left({\left(-41\right)}^3\right)}^{{}^{\frac{1}{3}}}\\ =-41\end{array}$