Question

If a(b)=b,what is the value of b? A.0 B.1 C.-1 D.2 E.-2 Explain i can give you 5 points.....

Answer 1

Let's try all the options just to be sure!
A. a(0) = 0
B. a(1) = a
C. a(-1) = -a
D. a(2) = 2a
E. a(-2)= -2a

The answer is A.0 for obvious reasons (it's the only one that meet the equality[ I ain't 100% sure of this translate of mine ])