Suma de patrate e patru
Moderators: Laurian Filip, Beniamin Bogosel, Filip Chindea
Suma de patrate e patru
Fie \( a,b,c,d \) trei numere reale satisfacand constrangerea \( a^2+b^2+c^2+d^2=4. \) Sa se demonstreze ca \( a^3+b^3+c^3+d^3\le 8. \)
. A snake that slithers on the ground can only dream of flying through the air.
-
Marius Mainea
- Gauss
- Posts: 1077
- Joined: Mon May 26, 2008 2:12 pm
- Location: Gaesti (Dambovita)