Les racines cubiques: 1) Démontrer qu ’ il existe n∈N tel que:(20+14√2)^1/3=n+√2

Cubic roots: 1)Prove that there exists n∈N such that: (20 14√2) ^ 1/3 = n √2 2) Explain and deduce (20 14√2) ^ 1/3 (20-14√2) ^ 1/3