Question

8la x=2 la x-2 multime numerelor reale

Answer 1

8=la3, 8lax=2la3x, 2lax-2=2laxinmulitcu2la-2=2laxinmultit1/4 ecuatia devine 2la3x=2laxori1/4 2lax=t 4tla3-t=0, t(4tpatrat-1)=0, t=0, 2lax=0 imposibil (2t-1)(2t+1)=0 2t-1=0,t=1/2, 2lax=1/2, x=-1 2t+1=0, t=-1/2, 2lax=-1/2 imposibil