Question

x=
$\sqrt{2}$
și y=
$\frac{1}{ \sqrt{2} }$
Arătați că
$\frac{x}{y} + \frac{y}{x} = \frac{5}{2} .$
Urgent va rog!

Answer 1

x/y=√2:(1/√2)=√2*√2=2
y/x= 1:(x/y)=1/2
2+1/2=5/2
as simple and urgent  as that!!!

Answer 2

..........................;)