Giúp mình mấy câu tích phân.

D

dien0709

dxx(x4+1) \int_{}^{}\dfrac{dx}{x(x^4 + 1)}

f(x)dx=(x4+1x4)dxx(x4+1) f(x)dx = \dfrac{(x^4 + 1 - x^4)dx}{x(x^4 + 1)}

f(x)dx=dxx+14d(x4+1)x4+1 f(x)dx = \dfrac{dx}{x} + \dfrac{1}{4}\dfrac{d(x^4 + 1)}{x^4 + 1}
 
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