Question

Determinati toate numerelle intregi x care verifica relatia : a) |x-3| =0 ; b) |x-6|=0; c) |x+5|=6 ; d) |x|€{0;10;100}

Answer 1

a) |x-3|=0 ⇒ x-3=0 ⇒ x=3

b) |x-6|=0 ⇒ x-6=0 ⇒ x=6

c) |x+5|=6 ⇒ x+5=-6 sau x+5=6 ⇒ x=-11 sau x=1⇒ x∈{-11;1}

d) |x|∈{0;10;100} ⇒ x∈{-100;-10;0;10;100}