Răspunsuri

2014-11-15T21:47:57+02:00
Daca cele 3 nr sunt in progresie aritmetica => x= \frac{2+x+4}{2}= \frac{6+x}{2}
x= \frac{6+x}{2} =>2x=6+x=> 2x-x=6=>x=6.