Question

Answer 1

Bài 1: 

a: \(M=\dfrac{x^4+2}{\left(x^2+1\right)\left(x^4-x^2+1\right)}+\dfrac{x^2-1}{x^4-x^2+1}-\dfrac{1}{x^2+1}\)

\(=\dfrac{x^4+2+x^4-1-x^4-x^2+1}{\left(x^2+1\right)\left(x^4-x^2+1\right)}=\dfrac{x^4-x^2+2}{\left(x^2+1\right)\left(x^4-x^2+1\right)}\)

 

Answer 2

Answer 3

Answer 4

Answer 5