Discussion
is a function such that 1 a = 1 and a b = b a for all a and b. Which of the following must be true? 
| (A) | I only |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 06/03/2014 10:22
I don't understand how "a ø b = b ø a" means that "1 ø a / 1 ø b" = "1 / 1". I know "1 ø a = 1", but how does that mean "1 ø b = 1"?
Posted: 06/10/2014 10:51
Miranda, given that 1 ø a = 1, we can substitute any number or variable into a. This means that 1 ø x =1; 1 ø 1000 =1; and yes, 1 ø b =1.