Question

Find the value of each of the following :

${\left(-1\right)}^{16}\times {\left(-1\right)}^{17}\times {\left(-1\right)}^{18}$

Answer 1

$$\begin{gathered} \Rightarrow {\left(-1\right)}^{16}\times {\left(-1\right)}^{17}\times {\left(-1\right)}^{18} \\ \Rightarrow 1\times \left(-1\right)\times 1 \\ \Rightarrow \left(-1\right)\times 1=-1 \end{gathered}$$

Hence, the final answer is$-1.$