Zad.6. Obliczyć granice funkcji:
1. lim
x -1 X + 1
16. lim
8-x
2.
3.
4.
5.
6.
lim
JC—>co
x -2x + l
yX2 -4x + 2y
-Jx2 -10x + 20 lim-
r-*» jc-10
79 + 21-5
lim-r=-
x-8 yjx -2
limU/x2 — 3jc +1 - a/*2 + x+l)
X—>«o ' /
yjx + *jx+ Vx
lim
a:—>oo
lim
8. |
lim |
X—>— | |
9. |
lim X |
x~>2 j | |
10. |
lim — |
i-2
17.
x~>8 1
sin-;zx
8
.. sin9x lim-
x~*° sin 3x
sm
31. lim
i* 1
6 — V 3-cosx
32. lim
2
arc sin x
18.
lim-'801
19. lim
sin fix 1 + COSJC
*->i 1
t8-«
1
33. lim (l + tg2 Vx)
* >0’ ' /
Vx-103
20.
cos x-cos n
lim-i-
— . 1 sinx-sin— n 4
34. lim
21. lim
arc sin
in(l - 2x)
4x -1
11. lim
x3 +125
22.
23.
24.
25.
.. x3-2x2-4x + 8
lim-----
~2 x -8x2 +16
.. x3-2x-l
lim—-
*-*-'x -2x-l
\-elx
35. lim-—-—
x->0arctgx
.. ln(l + x)
*-»o ex -1
ln (5* +l)
^ “ln^l + 2^)
38. lim(e*th<Tx)
39. lim (1 +cos x)
1
2x-x
sin(« + x)~ sin(of - x)
X—>0 -y*
lim
X->:
( | |
x- — |
tgx |
.1 2 J |
7x
40. Iimsin3xctg5x
*->-5 2x - 50
12.
.. \j\ + mx -1
lim-
26. lim-
13.
\Jl + x-3Jl + x0 lim---
l-«b X - Xn
27.
I_>0 5sin8x
limarctg^^ x~>° x
41. lim
. x6-l
42. lim
x^ 1 - x2
sin5x-sin3x
14.
.. Vx2 + 1 - Vx + 1 lim-F —
*-° 1-Vx + 1
28. lim log
x—>1
4x -i
29.
15. lim
l-cosx
limarccos
X~>0
x-l
V-l' \
sin x
(l + 2x]
X->0+
43. lim (l + 2x)5x
2x
3X -1 44. lim-—-
X
30. lim
cosx
45. lim
tgx-sinx
+* n - 2x
2
Zad.7. Wyznaczyć granicę prawo i lewostronną funkcji w punkcie c:
1. y = — c-Q
6. y = 2 +-r c = l 10. y =
2. y =
x-7
c = 7
l + 9i-r
(r-6X-2)W ,
y = -——— c = 6 x -36
cos2 x-sin2 x it
c — — 2
71
11. >> = sgn[x(-x2 + l)J c — —1
2