Question

ajutor va rog frumos​

Answer 1

Explicație pas cu pas:

15/(x+1)

x+1∈D{15}

x+1∈{1,3,5,15} |-1

x∈{0,2,4,14}

12/(2x+1)

2x+1∈D{12}

2x+1∈{1,2,3,4,6,12} |-1

2x∈{0,1,2,3,5,11} |:2

x∈{0,1}

Bafta!