Question

daca a=(√5-2)(√6+√5)(√3-√2) si b=(√5+2)(√6-√5)(√3+√2) atunci media geometrica a lor este..? Va roog ajutoor

Answer 1

mg=√(√5-2)(√6+√5)(√3-√2)(√5+2)(√6-√5)(√3+√2) =
=√(√5-2)(√5+2)(√6-√5)(√6+√5)(√3-√2)(√3+√2) =
=√(5-4)(6-5)(3-2)=
=√1=1
le-am ordonat si am aplicat formula (a+b)(a-b)=a²-b²