Proof That -1 Is Positive
Let

Clearly S is positive. Now multiply each side by 2:

But that’s just the same as S minus 1.
And if 2S = S – 1, then S = -1.
So -1 is positive.
Let

Clearly S is positive. Now multiply each side by 2:

But that’s just the same as S minus 1.
And if 2S = S – 1, then S = -1.
So -1 is positive.