Question

giúp e giải ạ e cảm ơn ac

Answer 1

a: DKXĐ: x>=0; x<>1

b: \(A=\dfrac{1-\sqrt{x}+1+\sqrt{x}}{1-x}-\dfrac{1-x^2}{1-x}\)

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