N
nhox_cuoi1209
Giai bai nay moi vui :
Given: SetA = (a,b,c,d) with a defined operation whose symbol is *. Which statement expresses the fact that b is identity element for this operation?
(A) a*a = b
(B) a*b = a
(C) a*b = b
(D) a*b = c
(E) b*c = a
Không lẽ a, b, c, d đều là 1????
Given: SetA = (a,b,c,d) with a defined operation whose symbol is *. Which statement expresses the fact that b is identity element for this operation?
(A) a*a = b
(B) a*b = a
(C) a*b = b
(D) a*b = c
(E) b*c = a
Không lẽ a, b, c, d đều là 1????