A binary operation * is defined on the set of real numbers R, by a* b = -1. Find the identity element under the operation *.
-
A.
-1 -
B.
0 -
C.
1 -
D.
2
Correct Answer: Option A
Explanation
(a * a^{-1} = e = -1)
(therefore a^{-1} = -1)
A binary operation * is defined on the set of real numbers R, by a* b = -1. Find the identity element under the operation *.
(a * a^{-1} = e = -1)
(therefore a^{-1} = -1)