Find the identity element in the set I+ of all positive integers defined by a * b = a + b for all a, b ∈ I+.
A. 1
B. 2
C. 3
D. 0
Answer:D
Find the identity element in the set I+ of all positive integers defined by a * b = a + b for all a, b ∈ I+.
A. 1 B. 2 C. 3 D. 0