Question

determinati multimile: C={x|x apartine lui N si (x+1)|(x+50)}

Answer 1

x+1/x+50
x+1/x+1 (-)
x+1/ x+50-x-1
x+1/49
x+1 ∈ D49⇒ x+1 ∈ {1,7,49}⇒ x∈{0,6,48}⇒ C= {0,6,48}