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Răspuns :


[tex]( \frac{4}{ \sqrt{3} } + \frac{ \sqrt{27} }{3} ) \times \frac{3}{ \sqrt{3} } = ( \frac{4 \sqrt{3} }{3} + \frac{3 \sqrt{3} }{3} ) \times \sqrt{3} = ( \frac{4 \sqrt{3} }{3} + \sqrt{3} ) \times \sqrt{3} = \frac{7 \sqrt{3} }{3} \times \sqrt{3} = \frac{21}{3} = 7[/tex]