Roadmap proposal for 3.10/4.0
Damien Cassou
damien.cassou at laposte.net
Tue Oct 17 19:07:56 UTC 2006
Ken Dickey a écrit :
> 4 sqrt. "2.0i"
If I remember correctly what my math teacher taught me, this is incorrect.
Rule of square roots:

a sqrt * b sqrt = (a*b) sqrt
Applied to 4:

(4) sqrt * (4) sqrt = 16 sqrt = 4
With your equality:

(4) sqrt * (4) sqrt = 2i * 2i = 4
We then have the same expression returning two different values. My
teacher concluded saying "sqrt is a function only valid for positive
numbers"
Bye

Damien Cassou
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