Question

Dau coroana ,repde va rog! !!doresc explicatie pas cu pas adica nu doar rezolvarile​

Answer 1

a) |x| ≤ 5 ⇔ -5 ≤ x ≤ 5, x∈Z ⇔ A = {-5,-4,-3,-2,-1,0,1,2,3,4,5}

b) 3 ≤ |x| < 7 ⇔ |x|∈{3,4,5,6} ⇔ B={-6,-5,-4,-3,3,4,5,6}

c) 2x+1 < -5 ⇔ 2x<-6 ⇔ x<-3, x∈Z ⇔ C={...,-5,-4}

d) x+2 > -6 ⇔ x>-8, x∈Z ⇔ D={-7,-6,-5,...}