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10 problems with answers.
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4 Integralni racun - integracija racionalnih f-ja
Izracunati sljedece integrale
1.
∫
dx
x2 + x+ 3
2.
∫
dx
2x2 − 6x+ 5
3.
∫
dx
x2 + 4x+ 4
4.
∫
dx
4x2 + 4x+ 1
5.
∫
dx
4x2 + 4x− 3
6.
∫
6x+ 10
x2 + 2x− 3
dx
7.
∫
3x+ 1
x2 + 4x+ 4
dx
8.
∫
3x+ 5
x2 + 4x+ 8
dx
9.
∫
x− 3
x2 − 4x+ 5
dx
10.
∫
x+ 6
x2 + 3
dx
11.
∫
2x+ 1
x2 − 6x+ 25
dx
12.
∫
3x+ 2
x2 + 2x+ 5
dx
13.
∫
xdx
(x − 1)2(x2 + 2x+ 2)
14.
∫
x3 + 1
x3 − 5x2 + 6x
dx
7
Rjesenja:
1.2√11
arctan2x+ 1√
11+ c
2. arctan(2x− 3) + c
3. − 1
x+ 2+ c
4. − 1
2(2x+ 1)+ c
5.1
8ln
∣
∣
∣
∣
∣
x− 1
2
x+ 3
2
∣
∣
∣
∣
∣
+ c
6. 4 ln |x− 1|+ 2 ln |x+ 3|+ c
7. 3 ln |x+ 2|+ 5
x+ 2+ c
8.3
2ln |x2 + 4x+ 8| − 1
2arctan
x+ 2
2+ c
9.1
2ln |x2 − 4x+ 5| − arctan(x − 2) + c
10.1
2ln |x2 + 3|+ 2
√3 arctan
x√3+ c
11. ln |x2 − 6x+ 25|+ 7
4arctan
x− 3
4+ c
12.3
2ln |x2 + 2x+ 5| − 1
2arctan
x+ 1
2+ c
13.1
25ln |x− 1| − 1
5(x− 1)− 1
50ln |x2 + 2x+ 2| − 7
25arctan(x + 1) + c
14. x+1
6ln |x| − 9
2ln |x− 2|+ 28
3ln |x− 3|+ c
Eventualne greske prijaviti na mail [email protected].
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