Question

Se considera multimile :A={x €R/ |x| < sau egal cu 4} si B={x €R/1-(x-2)÷2< sau egal cu 2x-3} .Determinati A intersectat cu B

Answer 1

lxl<=4, x=(-infinit,-4]U[+4,+infinit)
A={x €R l  x=(-infinit,-4]U[+4,+infinit)}

1-(x-2)/2<2x-3
(x-2)/2>4-2x
x-2>8-4x
5x>10
x>2
B={x €R l x>2}
   _
Al  lB={x €R l x>4}