f ¢( )x = (sin(x2 ))¢ = 2xcos(x2 ) f ¢¢( )x = 2cos(x2 )-4x2 sin(x2 )
M 2 = max 2cos(x2 )-4x2 sin(x2) £ 2
R2 = M212(bn-2a)3 = 122**1008 = = 0.013
dan katta emas.
12
3-misol. ò x3 +13 dx integralni parabolalar formulasi yordamida taqribiy hisoblang.
2
Yechish. n =10, h= Dx = 1.
f x( )= x3 +13
quyidagi jadvalni to’ldiramiz.
i
|
0
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
xi
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
yi
|
4,582
|
6,324
|
8,775
|
11,747
|
15,133
|
18,868
|
22,913
|
27,240
|
31,828
|
36,661
|
41,725
|
(6) formulaga asosan
12ò2 x3 +13 dx» 13 éë4,5882+ 41,725+ 4 6,324( +11,747 +18,868+ 27,240+36,661)+
+2 8,775( +15,133+22,913+31,828)ù=û 197,808
Mustaqil yechish uchun misollar.
Quyidagi integrallarni integrallash oralig`ini 10 bo`lakka bo`lib, to`g`ri to`rtburchak, Trapetsiyalar va Simpson formulalari yordamida taqribiy hisoblang. Absolyut xatoni aniqlab bo`lmagan holda hisoblashlarni 0,001 aniqlikda bajaring.
p
1. 13ò3 x3 +3 dx 2. 10ò0 x + 4 dx 3. 10ò0 x3 +1 dx 4. pò2 sinxxdx
4
5. ò10 2+1 x dx 6. -ò82 x +12 dx 7. ò01 e dx-x2 8. ò20 3+1 x dx
123112
9. ò x3 +8 dx 10.ò dx 11.ò 3-x dx2 12. ò x2 +7 dx
202
13. ò50 x 1-2 dx 14. 11ò1 x +6 dx 15.ppò cosx x dx 16. ò21 x +1 7 dx
2
17. 14ò4 x3 +5 dx 18. ò72 lnx1 dx 19. ò38 x1-1dx 20.11ò1 x3 +9 dx
p
21. ò30 cos x dx 22. ò85 x +1 7 dx 23. 15ò5 x3 -1dx 24. ò01 1+ 4x dx3 25.ò30 x +1 7 dx
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