Question

Sa se determine in functie de x care apartine lui R intersectia intervalelor: I=[x-1/2, +infinit) si J=(-infinit, 2x+3/5]

Answer 1

2x+3/5<x-1/2 intersectia este ∅
adica
x<-1/2-3/5=-5/10-6/10=-11/10

pt x=-11/10 intresectia este 2*(-11/10)+3/5=-22/10+6/10=-16/10=-8/5
sau, scris ca multime {-8/5}

pt x>-11/10, intersectia este[x-1/2;2x+3/5]
as tricky as that!!