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A Poof

Consider...

1 = SQRT(1)
= SQRT[(-1)(-1)]
= SQRT(-1) SQRT(-1)
= [SQRT(-1)]2
= -1

Is it a "proof"? A "poof"?

Where do your concerns focus?

Is it true? Careful...what would the mathematical world look like if it was true?

I love these little gems, pests though they may be to students!

If you want more of the same, consider the Website Review for this week.