Odpowiedzi

2009-12-03T14:15:39+01:00
1/(2+√3) + (2-√3)⁻¹=
=1/(2+√3) + 1/(2-√3)=
=1/(2+√3) * (2-√3)/(2-√3) + 1/(2-√3) * (2+√3)/(2+√3)=
=(2-√3)/(4-3) + (2+√3)/(4-3)=
=(2-√3)/1 + (2+√3)/1=
=(2-√3)+ (2+√3)=
=2-√3 + 2+√3= 4