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B - Prírodovedecká fakulta - Univerzita Komenského

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ln x 1<br />

lim = lim = 0<br />

+ + ln x ln x<br />

d. 2<br />

x→0 x→0<br />

a.<br />

b.<br />

c.<br />

d.<br />

e.<br />

f.<br />

Príklad 40. Vypočítajte nasledovné limity:<br />

x<br />

2<br />

lim<br />

x→∞<br />

2<br />

x<br />

10x<br />

+ x + 10<br />

2<br />

− 7<br />

lim<br />

x→∞<br />

2<br />

x − x<br />

2x<br />

3x<br />

2<br />

+ 7x<br />

+ 100<br />

+ 5<br />

+ 70<br />

+ x + 10<br />

lim<br />

x→∞<br />

2<br />

x<br />

lim<br />

x→∞<br />

2<br />

x<br />

6x<br />

8x<br />

3<br />

lim<br />

x→∞<br />

3<br />

x<br />

− x<br />

2x<br />

9<br />

x<br />

2<br />

+ 5<br />

− 5<br />

+ 7<br />

+ x + 1<br />

+ x<br />

+ 47<br />

lim<br />

x→∞<br />

9 6 2<br />

− x + x<br />

7<br />

+ x<br />

Riešenie.<br />

2<br />

x + x + 10<br />

a. lim = 1<br />

x→∞<br />

2<br />

x − 7<br />

3<br />

−1<br />

− 5<br />

2<br />

10x<br />

+ 7x<br />

+ 100<br />

b. lim = 10<br />

x→∞<br />

2<br />

x − x + 70<br />

c.<br />

d.<br />

2x<br />

lim<br />

x→∞<br />

2<br />

x<br />

3x<br />

6x<br />

2<br />

lim<br />

x→∞<br />

2<br />

x<br />

+ x + 10<br />

=<br />

+ 5 + 7<br />

x<br />

2<br />

+ 5<br />

2<br />

3<br />

=<br />

+ 47<br />

3<br />

8x<br />

+ x + 1<br />

e. lim = 8<br />

x→∞<br />

3<br />

x − 5<br />

1<br />

6<br />

− 5x<br />

+ x<br />

4 2<br />

g. lim<br />

x→∞<br />

4<br />

4x<br />

h.<br />

→∞<br />

6 2<br />

+ 10<br />

6<br />

12x<br />

+ x + 10<br />

lim<br />

x − 5x<br />

− 7x<br />

2 11<br />

x + x + 1<br />

lim<br />

x x − 7x<br />

i.<br />

→∞<br />

2 11<br />

j.<br />

x<br />

2<br />

+ x + 10x<br />

lim<br />

x→∞<br />

2 5<br />

x x<br />

− 6<br />

k.<br />

→∞<br />

2 6<br />

5<br />

+ 44<br />

3 6<br />

x + x − 2<br />

lim<br />

x 20x<br />

− 9x<br />

7 7<br />

x + x −1<br />

lim<br />

x x − 8x<br />

l.<br />

→∞<br />

2 7<br />

f.<br />

g.<br />

h.<br />

i.<br />

9 7 3<br />

− x + x + x −1<br />

1<br />

= −<br />

2x<br />

− + − 5 2<br />

lim<br />

x→∞<br />

9 6 2<br />

x x<br />

− 5x<br />

4<br />

+ x<br />

4<br />

lim<br />

x→∞<br />

4<br />

x<br />

2<br />

+ 10<br />

= −<br />

6<br />

12x<br />

+ x + 10 12<br />

= −<br />

6<br />

− 5x<br />

− 7 5<br />

lim<br />

x→∞<br />

2<br />

x<br />

x<br />

2<br />

+ x<br />

− 7<br />

11<br />

lim<br />

x→∞<br />

2 11<br />

x x<br />

+ 1<br />

= −<br />

1<br />

7<br />

Lekcia 6 - Limita funkcie 2<br />

5<br />

4<br />

m.<br />

n.<br />

o.<br />

j.<br />

k.<br />

l.<br />

m.<br />

x<br />

500<br />

+ x<br />

lim<br />

x→∞<br />

2 500<br />

x x<br />

23x<br />

− 6<br />

23x<br />

44<br />

23<br />

lim<br />

x→∞<br />

2 23<br />

+ x<br />

− x<br />

9<br />

lim<br />

x→∞<br />

9<br />

x<br />

x<br />

− 9<br />

2<br />

lim<br />

x→∞<br />

2 5<br />

x x<br />

− 9<br />

+ 10x<br />

− 44<br />

− 7<br />

− x −10<br />

5<br />

+ x + 10x<br />

5<br />

= −<br />

− 6 + 44 3<br />

3 6<br />

x + x − 2<br />

= −<br />

2<br />

20x<br />

− 9<br />

lim<br />

x→∞<br />

6<br />

x<br />

7 7<br />

x + x −1<br />

1<br />

= −<br />

2<br />

x − 8 4<br />

lim<br />

x→∞<br />

7<br />

x<br />

x<br />

+ x<br />

− 6<br />

500 44<br />

lim<br />

x→∞<br />

2<br />

x<br />

500<br />

x<br />

69<br />

1<br />

9<br />

+ 10x<br />

1<br />

= −<br />

− 44 6<br />

23<br />

23x<br />

n. lim = 23<br />

x→∞<br />

2 23<br />

23x<br />

+ x − 7

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