If (1+a)y=y, which of the following must be true?
Choose the correct choice from the following answers:
A) a=-1 or y=0 B) a=0 or y=0 C) a=1 or y=1 D) a=-1 or y=-1 E) a=0 or y=1
We have (1+a)y=y.   If a=0, y=y. True   If y=0, (1+a)*0=0 True   So, a=0 or y=0 will be the answer.
<result>B</result>
If (1+a)y=y, which of the following must be true?