Question

$(-1{)}^{17}\times (-1{)}^{28}$ is equal to:

• A. $1$
• B. $0$
• C. $2$
• D. $-1$

Answer 1

The correct option is D $-1$

$(-1{)}^{17}\times (-1{)}^{28}=(-1{)}^{17+28}=(-1{)}^{35}=-1$
$\left[since\right(-1{)}^{odd}=-1$ and $(-1{)}^{even}=1]$