Explicación paso a paso:
[tex] \frac{7}{ \sqrt{2} } [/tex]
[tex] \frac{7}{ \sqrt{2} } \times \frac{ \sqrt{2} }{ \sqrt{2} } [/tex]
[tex] \frac{7 \sqrt{2} }{ \sqrt{2 \times 2} } [/tex]
[tex] \frac{7 \sqrt{2} }{ \sqrt{4} } [/tex]
[tex] \frac{7 \sqrt{2} }{2} [/tex]
