passpadi

2021

Mathematics

JAMB

If the binary operation ∗ is defined by m ∗ n = mn + m + n for any real number m and n, find the identity of the elements under this operation

A.

e = 1

B.

e = -1

C.

e = -2

D.

e = 0

Correct Answer: e = 0

Explanation

Identity(e) : a ∗ e = a m ∗ e = m...(i) m ∗ e = me + m + e Because m ∗ e = m : m = me + m + e m - m = e(m + 1) e = 0/(m + 1) e = 0

Identity(e) : a ∗ e = a m ∗ e = m...(i) m ∗ e = me + m + e Because m ∗ e = m : m = me + m + e m - m = e(m + 1) e = 0/(m + 1) e = 0
passpadi
©2023 Passpadi. All rights reserved.