Question

A={x€N*|x+3|36}
B={x€N*|2x+1|45}
C={x€N|x<27;8|x+5}
Ajutati.ma va roog

Answer 1

A.  (x + 3) ∈ divizori 36, adica, {4,6,12,18,36 } ⇒ x ∈ { 1,3.9,15,33}
B.  (2x + 1) ∈ {3,5,9,15,45} ⇒ x ∈ { 1,2,4, 7, 22}
C.   (x+5) ∈ {8, 16,24}  ⇒ x ∈ {3,11, 19}