1 câu trả lời
`\sqrt{1/3}-\sqrt{(\sqrt{3}-2)^2}+2/(\sqrt{3}-1)`
`=1/\sqrt{3}-\sqrt{(2-\sqrt{3})^2}+(2(\sqrt{3}+1))/((\sqrt{3}-1)(\sqrt{3}+1))`
`=\sqrt{3}/3-|2-\sqrt{3}|+(2(\sqrt{3}+1))/(2)`
`=\sqrt{3}/3-2+\sqrt{3}+\sqrt{3}+1`
`=\sqrt{3}/3+2\sqrt{3}-1`
`=(\sqrt{3}+6\sqrt{3}-3)/3`
`=(7\sqrt{3}-3)/3`
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