Question

The multiplicative inverse of – 1 in the set {-1,1}is

Answer 1

Answer: The multiplicative inverse of – 1 in the set {-1,1} is -1.

Explanation:

In algebra, the multiplicative inverse of a number(x) is a number (say y) such that

`x* y=1` [product of a number and its inverse =1]

if x= -1, then

`-1* y=1\Rightarrow\ y=-1`

That means , the multiplicative inverse of -1 is -1 itself.

Hence, the multiplicative inverse of – 1 in the set {-1,1} is -1.