:
= 2n 1; 1=1, 2 =3, 3=5..
=n / (2n+ 1);1=1/3, 2 =2/5, 3=3/7, 4=4/9, 5 =5/11, 6=6/13 → ½
=n / (n+ 1);1=1/2, 2 =2/3, 3=3/4, 4=4/5, 5 =5/6, 6=6/7 → 1
=(n+1) / n;1=2, 2 =3/2, 3=4/3, 4=5/4, 5 =6/5, 6=7/6 → 1
= (1+(-1)n) /n; 0; 1; 0; 1/2; 0; 1/3; 0; ¼→ 0
(1+ n) /n; 2; 3/2; 4/3; 5/4..→ 1
_______,_____,__,__,____,____,________________,__
1/(n+1) 1/2 1/31/4 1/5 1/6..→ 0
n 0
. b ,, n, , b
limXn = b
n→∞
│ -1│=│1 / (n+1) - 0│=│1/(n+1)│= 1/ (n+1)
n .
n = 10 1/(n+1) = 1/11 11 <1/11
n = 100 1/(n+1)= 1/101 101 <1/101.
, έ , (N0), N>N0, │- b│<έ,
..
(1 έ; 1+ έ),1- έ<, <έ + 1
. b ,, έ >0 N(έ), n>N │- b│<έ
. f (x) →, , f (x) .
lim f (x) =
→
. f (x) →, έ >0, δ >0 , 0<│ - │< δ,
│ f (x) - b │< έ
.
:
. .
Lim =
→
f1(x) f2(x),
lim[f1(x) f2(x)]= limf1(x) limf2(x)
→ࠠ → →
lim[f1(x)f2(x)]= lim f1(x)limf2(x)
→ࠠ →→
lim[f1(x) ∕ f2(x)]=lim[f1(x) ∕lim f2(x)];lim f2(x)# 0
→ࠠ →→ࠠ →
.
(42 -1)/(2-1)
lim(42 -1)/(2-1) = (2-1)(2+1)/(2-1) =13,
→6
=6
lim(42 -1)/(2-1) = (2-1)(2+1)/(2-1) =2
→1/2
(.) = ½, 2.
, , =, . .
|
|
. f (x) (..) →,
limf (x)= 0
→
..
→2
lim2 -4 =-3 - ..
→1
. f (x) ,
limf (x)= ∞ ..
→
.. .. →∞.
.. .. , .
1. , .
2. . .
3. :
1) .
2) .. .. .
:
1). .. .. .
2). .
3). .. .. ..
, . , .
: Lim
→1
,
: ∞/∞; 0/∞; 0/0 ..
1. .
: Lim
→ ∞
2.
: Lim
→ -2
. 1 →, , > a, 1 .
limf (x)= 1
→+0
:
. 2 →, , < a, 2 .
limf(x)= 2 1 =2=,
→-0
:. . 7.46,7.47;7.48;7.51
. = 1/(+2)
lim1/(+2) = - ∞
→-2-0
lim1/(+2) = + ∞
→-2+0
= /(-3)
lim/(-3) = + ∞lim/(-3) = - ∞
→-3-0 →-3+0
1.
1 2 , f (x 1) f (x 2) y = f (x), ∆= x 2 x 1, [ x 2, x 1 ], ∆= f (x 2) - f (x 1)= f (x+∆) f (x), ∆ .
:
=2-2+3
) 1=0 2=1;
) 1=-1 2=3;
) ∆=x2 x1 =1- 0 = 1; ∆ = 1-2+3-3= -1
|
|
)∆=x2 x1 = 3-(-1) = 4; ∆ = 9-6+3-(1+2+3) = 0
. 7.175; 7.178-7.180
y = f (x) (.) = , , .
lim ∆ = 0
∆→
y = f (x) (.) = , :
- (.) = , . (.) = , f ();
- , .. limf (x)= ;
→
- (.) = ,... limf (x)= = f ().
→
. .
= y=f(x), = , = .
. , ( ).
, .
. , limf(x)= limf(x) ≠ f() →-0 →+0
, limf(x)= limf(x) ≠ f()
→-0 →+0
f(+0) - f(+0) = .
. = 1/(+3)
(-∞;-3) (-3; +∞)
lim1/(+3) = - ∞
→-3-0
lim1/(+3) = + ∞
→-3+0
=-3, .. .
.
. =1/(1+21/)
≠ 0
lim1/(1+21/) = 1
→-- 0
lim1/(1+21/) = 0
→-+ 0
=0, - . .
.
. = 1/(+5)2
(-∞;-5) (-5; +∞)
lim1/(+5)2= + ∞
→-5-0
lim1/(+5)2= + ∞
→-5+0
= -5, .. .
.
.
≤ 0
2 0< ≤ 1
x +1 >1
:
lim2= 1lim +1= 2 lim2= 0 lim= 0
→10 →1+ 0 →+ 0 →- 0
1- =1
.
. =31/
≠ 1
lim31/ = 0
→- 0
lim31/ = +∞
→+0
= 0, .. .
. y = f (x) ∆ ∆, 0.
⁄ = lim ∆/∆
∆→0
, y=f(x) (.) .