Question

TEMA: Potencias y radicales
Racionaliza
a) 2/√7
b) 1/√3
c) 2/4-√11

Answer 1

$\frac{2}{ \sqrt{7} } \times \frac{ \sqrt{7} }{ \sqrt{7} } = \frac{2 \sqrt{7} }{7} \\ \frac{1}{ \sqrt{3} } \times \frac{ \sqrt{3} }{ \sqrt{3} } = \frac{ \sqrt{3} }{3} \\ \frac{2}{4 - \sqrt{11} } \times \frac{4 + \sqrt{11} }{4 + \sqrt{11} } = \frac{2(4 + \sqrt{11}) }{16 - 11} = \frac{8 + 2 \sqrt{11} }{5}$