[tex] \sqrt{ \frac{3}{81} } = \sqrt{ \frac{1}{27} } = \frac{1}{ \sqrt{27} } = \frac{1}{3 \sqrt{3} } = \frac{1}{3 \sqrt{3} } \times \frac{ \sqrt{3} }{ \sqrt{3} } = \frac{1 \sqrt{3} }{3 \sqrt{3} \sqrt{3} } = \frac{ \sqrt{3} }{3 \sqrt{3} } = \frac{ \sqrt{3} }{9} [/tex]
ya ta :v
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[tex] \sqrt{ \frac{3}{81} } = \sqrt{ \frac{1}{27} } = \frac{1}{ \sqrt{27} } = \frac{1}{3 \sqrt{3} } = \frac{1}{3 \sqrt{3} } \times \frac{ \sqrt{3} }{ \sqrt{3} } = \frac{1 \sqrt{3} }{3 \sqrt{3} \sqrt{3} } = \frac{ \sqrt{3} }{3 \sqrt{3} } = \frac{ \sqrt{3} }{9} [/tex]
ya ta :v