Question

bài 1 câu a ạ

Answer 1

a: Ta có: \(A=\dfrac{3}{\sqrt{3}+1}-\dfrac{2}{1-\sqrt{3}}\)

\(=\dfrac{3\sqrt{3}-3}{2}+\dfrac{\sqrt{3}+1}{1}\)

\(=\dfrac{3\sqrt{3}-3+2\sqrt{3}+2}{2}\)

\(=\dfrac{5\sqrt{3}-1}{2}\)