Question

calculati media geometrica a numerelor a si b, unde a=(√3-1) (√6+2), b=(√3+1) (√6-2)
mg=?

Answer 1

mg=√(a×b)=√(3-1)(6-4)=√(2×2)=2. Cand calculam a×b aplicam formula diferentelor de patrate. Astfel (√3-1)(√3+1)=3-1=2 iar (√6+2)(√6-2)=6-4=2