ONG TV Scofala Virtuala . 2 + 1 x2 - 1 E ' - 1

ONG TV Scofala Virtuala 2 1 X2 1 E 1 class=

Răspuns :

1/(x-1)-2/(x²-1)=1/(x-1)-2/(x-1)(x+1)=(x+1-2)/(x-1)(x+1)=(x-1)/(x-1)(x+1)=1/(x+1)

2/(x²-1)+1/(x+1)=1/(x-1)