[tex]a) \frac{1}{x} + \frac{1}{y} = \frac{1}{2 \sqrt{3} } + \frac{1}{3 \sqrt{2} } = \frac{3 \sqrt{2 } + 2 \sqrt{3} }{2 \sqrt{3} \times 3 \sqrt{2} } = \frac{ \sqrt{18} + \sqrt{12} }{6 \sqrt{6} } [/tex]
[tex]b) \frac{1}{ \sqrt{5} } + \frac{1}{ \sqrt{5} } = \frac{2}{ \sqrt{5} } [/tex]
Sper că te-am ajutat!
