MCQ
What is the value of$ (-1)^{-1}$?
- A$0$
- ✓$1$
- C$-1$
- DNone of these
✓
Answer
Correct option: B.
$1$
Let $x$ be a number. Then $\text{x}^{-1}=\frac{1}{\text{x}}$
So, in this case $x$ is $-1.$
Therefore,
$(-1)^{-1}$
$=-\frac{1}{1}$
$=-1$
So, in this case $x$ is $-1.$
Therefore,
$(-1)^{-1}$
$=-\frac{1}{1}$
$=-1$
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