Question

Aflati multimea M={x€N |4x+1mai mare sau egal 9}.

Answer 1

rezolvam inecuatia:$4x+1 \geq 9$⇒$4x \geq 9-1$⇒$4x \geq 8$⇒$x \geq 8:4$⇒$x \geq 2$
Rs.M={x∈N|x≥2}.=[2,+∞)