If the binary operation \( \ast \) is defined by \( m \ast n = mn + m + n \) for any real number m and n, find the identity of the elements under this opera...
If the binary operation \( \ast \) is defined by \( m \ast n = mn + m + n \) for any real number m and n, find the identity of the elements under this operation
Answer Details
m ∗ n = mn + m + n m ∗ e = me + m + e, e ∗ m = e ∴ me + m + e, m(e + 1)e - e = 0 e + 1 = 0 ∴ e = -1