Question

$\frac{12}{4x-5}$  ...sa se afle X ...unde x ∈ N

Answer 1

pentru ca x sa fie natural trebuie ca 4x-5 sa fie egal cu 1,2,3,4,6,12

4x-5=1=>x=3/2 ∉N
4x-5=2=>x=7/4∉N
4x-5=3=>x=2
4x-5=4=>x=9/4∉N
4x-5=6=>x=11/4∉N
4x-5=12=>x=17/4∉N

Answer 2

x={0,1,2,3,4,5.....9}