## mathslover Group Title integrate (from -1 to 1) x^2+x+1 (dx) 2 years ago 2 years ago

1. mathslover

|dw:1344593806371:dw|

2. mathslover

i am getting 5/3 ..

3. sami-21

i hope you do not need that method again :PPPPPPPPPPPPPPPPP

4. Hashir

|dw:1344593826776:dw|

5. Hashir

|dw:1344593866185:dw|

6. mathslover

|dw:1344593835846:dw|

7. mathslover

m i right?

8. sami-21

you should have 8/3 :P

9. sami-21

you missed the 1

10. Hashir

|dw:1344593935823:dw|

11. Hashir

|dw:1344593979072:dw|

12. mathslover

where did i miss the 1 ? : 1/3 + 1/3 + 1/2 - 1/2 + 1 5/3

13. Hashir

14. mathslover

|dw:1344594005970:dw|

15. mathslover

Oh k so u mean another 1

16. mathslover

2/3 + 2 = 8/3

17. sami-21

yup

18. mathslover

but i dont get that how will we get another 1 : $\large{[\frac{x^3}{3}](-1 to1)+[\frac{x^2}{2}](-1 to 1)+1}$ that 1 ( last term) should be single

19. sami-21

|dw:1344637291535:dw|

20. mathslover

since : |dw:1344594117232:dw|

21. sami-21

i missed two under x^2

22. Hashir

gimme a medal

23. sami-21

yes now integrate each term.

24. sami-21

integration of 1 is x ! if you take its derivative you get 1 back :)

25. mathslover

right i got it @sami-21 thanks a lot

26. experimentX

seems all right ... |dw:1344594217239:dw|

27. sami-21

yw:)

28. mathslover

right .. thanks @experimentX also

29. experimentX

np :)