- #1
x-is-y
- 5
- 0
I'm not 100% sure what this is in English so I'll try to describe it. Gives that:
A: x^2 < 16
B: -4 < x
C: -4 < x < 4
I'm supposed to put out every possibility for => and <=> between A,B and C. The key says that A => B, A <=> C and C => B. I can understand this, but isn't it true for every proposition (I think that it's called this) that A <=> A. That is, every proposition implies itself?
A: x^2 < 16
B: -4 < x
C: -4 < x < 4
I'm supposed to put out every possibility for => and <=> between A,B and C. The key says that A => B, A <=> C and C => B. I can understand this, but isn't it true for every proposition (I think that it's called this) that A <=> A. That is, every proposition implies itself?