a)
[tex] \frac{1}{ \sqrt{7} } = \frac{1 \sqrt{7} }{7} = \frac{1}{7} \sqrt{7} [/tex]
b)
[tex] \frac{1}{4 \sqrt{5} } = \frac{1 \sqrt{5} }{4 \times 5} = \frac{ \sqrt{5} }{20} = \frac{1}{20} \sqrt{5} [/tex]
c)
[tex] \frac{6 \sqrt{2} }{ \sqrt{3} } = \frac{6 \sqrt{2} \times \sqrt{3} }{3} = \frac{6 \sqrt{6} }{3} = 2 \sqrt{6} [/tex]
Myślę że pomogłem ;)
