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Integrale - tips?

 
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In2ition

[Globul de cristal]



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(since 30-04-2018 18:33)
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Post Posted: 20-11-2010, 20:04:45 | Translate post to: ... (Click for more languages)

Nu am stiut sa fac cateva integrale, ceva idei, prin parti / schimbare variabila?
http://d.imagehost.org/view/0910/integrale


We stop looking for monsters under the bed when we realize they're inside of us.

nr913 wrote:
no really, dacã nu era așa țãrancã, și dacã era în bucurești, o luam de nevastã

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Allecs

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Post Posted: 27-11-2010, 18:45:38 | Translate post to: ... (Click for more languages)

din plictiseala m-am uitat peste ele si am rezolvat ex1, dar e cam lung, sper sa intelegi ce explic.

integrala x^3radicalx^2 + 4= inmultesti si imparti cu radicalul si iti da integrala x^5 +4x^3 supra radicalx^2 +4. Distribui numaratorul si ar trb sa ajungi la integrala din x^5 / radical x^2 + 4 + 4integrala din x^3 / radical x^2 + 4.
mai departe:
integrala x^4 ori x/radicalul... + 4integrala din x^2 ori x/radicalul...
mai departe faci prin parti: notezi x^4 cu f si x/radicalul ala cu g' si sper ca te descurci. daca nu poti nici de aici atunci ai nevoie de meditatii :p.

a doua cel mai probabil se rezolva in acelasi stil si mai departe mi-e lene.

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