Question

Scrieti elementele multimilor A={x apartine N| 3x+11supra x+1 apartine N}

Answer 1

Explicație pas cu pas:

3x+11/x+1 €N <=>x+1|3x+11

x+1|3x+11

x+1|x+1 =>x+1|3(x+1) => x+1|3x+3

=>x+1|3x+11-3x-3=>x+1|8 =>x+1€D8 in Z =>x+1€{-8,-4,-2,-1,1,2,4,8} =>

x€{-9,-5,-3,-2,0,1,3,7} => S€{0,1,3,7}