Răspuns:
[tex]2.(3) = \frac{23 - 2}{9} = \frac{21}{9} = \frac{7}{3} [/tex]
[tex]1.75 = \frac{175}{100} = \frac{7}{4} [/tex]
[tex]mg = \sqrt{ \frac{7}{3} \times \frac{7}{4} } = \sqrt{ \frac{49}{12} } = \frac{7}{ \sqrt{12} } = \frac{7 \sqrt{12} }{12} = \frac{7 \times 2 \sqrt{3} }{12} = \frac{7 \sqrt{3} }{6} [/tex]
