tich phan

V

vinh130887@gmail.com

Nguyên hàm xdx/căn x^4-x^2+2 hepl meeeeeeeeeeeeeeeeeeeeeeeeeeeeee

đặt t = % MathType!MTEF!2!1!+-
% feaagGart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn
% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr
% 4rNCHbGeaGqiVCI8FfYJH8YrFfeuY-Hhbbf9v8qqaqFr0xc9pk0xbb
% a9q8WqFfeaY-biLkVcLq-JHqpepeea0-as0Fb9pgeaYRXxe9vr0-vr
% 0-vqpWqaaeaabiGaciaacaqabeaadaqaaqaaaOqaaiaadIhadaahaa
% Wcbeqaaiaaikdaaaaaaa!37D0!
\[{x^2}\]
 
N

nguyenbahiep1

Nguyên hàm xdx/căn x^4-x^2+2 hepl

[laTEX]\int \frac{xdx}{x^4-x^2+2} \\ \\ x^2 = u \Rightarrow xdx = \frac{du}{2} \\ \\ \int \frac{du}{2(u^2-u+2)} = \frac{1}{2}\int \frac{du}{(u-\frac{1}{2})^2+(\frac{\sqrt{7}}{2})^2} \\ \\ u-\frac{1}{2} = \frac{\sqrt{7}}{2}tant[/laTEX]
 
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