Question

20 БАЛЛОВ

$frac{1}{ sqrt{5}+ sqrt{2} } + frac{1}{ sqrt{5}- sqrt{2} }$
$frac{ sqrt{2} }{2- sqrt{2} }+ frac{ sqrt{2} }{2+ sqrt{2} }$
$frac{2}{ sqrt{2}+1 } - frac{2}{ sqrt{2}-1 } + frac{3}{2 sqrt{2} }$
$frac{3}{ sqrt{3}+1 } - frac{2}{1- sqrt{3} } + frac{3}{3 sqrt{3} }$

Answer 1

прилагаю листочек.....................