@postoergosum1@fratotolo2 Ciao Demetrio, quel trafiletto sotto al titolo si chiama "data", identifica il momento in cui viene detta/scritta/pubblicata una dichiarazione.
@giuseppe8140533@signoredelno@Luca_Fantuzzi Cifre fantasiose che una volta considerati i costi fissi di una P.I. diventano plausibilmente vicini al totale effettivo da sborsare.
@kuranokur@Math_files Of course you can equalize any different variable, like a=b or x=y. If you couldn't most of math would vanish. The small error is the elimination of (a-b), that's a division by 0 since a=b.
@mathemetica A progression of perfect 5th (or 4th) will never match with perfect octaves, since (3/2)^n ≠ 2^m for any (n,m) (it's a trivial consequence of the uniqueness of prime factorisation).
The 5th/4th circle requires equal temperament i.e not pitagorean (perfect) intervals.
@poutine_ca@MyLordBebo Back in the '80s you could already find Legos in any (West) European toys shop, they were in the shelf next to Playmobil, which was chiper, but it sucked.