y = f (x) [a;b], [a;b-], >0. , f (x):
, .
50. Rn. .
Rn. .
pₒ- Rⁿ ε . , ε pₒ , pₒ ε:
{p Rⁿ │ ρ (pₒ,p)< ε}.
ε pₒ B(pₒ, ε) U3(pₒ). U3(pₒ)
ε pₒ.
:
Rⁿ. :
- ,
ε;
- , Rⁿ;
- , , , , , , .
.
X , .
X , .
.
X - Rn. p0 X,
ε- p0 X, p0.
p0 , X.
p0 X X, ε-, X, p0, .
, ,
.
.
Rn , . 0 Rn, , 0 , 0 .
55. Rn, .
56. .
, Rn Rm, .