Tích Phân............

D

defhuong

Bài 1 : [tex]\int\limits_{1}^{\sqrt{3}}x^3\sqrt{x^3+1}dx[/tex].
Bài 2 :[tex]\int\limits_{\frac{\pi}{6}}^{\frac{\pi}{3}}\frac{1}{sin^4xcosx}dx[/tex].

[TEX]\int\limits_{\frac{\pi}{6}}^{\frac{\pi}{3}}\frac{1}{sin^4xcosx}dx=\int \frac{cosxdx}{sin^4xcos^2x}=\int \frac{d(sinx)}{sin^4x(1-sin^2x)}[/TEX]
:)
Câu 1 là x^3 hay căn bậc 3 thế bạn :|
 
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