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Rezolvați :
B= {x e N/2x-1 <7}


Răspuns :

2x-1<7
2x<7+1
2x<8
x<8:2
x<4
X∈{0,1,2,3}
[tex]B= [ x eN|2x-1\ \textless \ 7]=\ \textgreater \ 2x-1\ \textless \ 7 =\ \textgreater \ 2x\ \textless \ 7+1=\ \textgreater \ 2x\ \textless \ 8=\ \textgreater \ [/tex][tex]x\ \textless \ \frac{8}{2} =\ \textgreater \ x\ \textless \ 4=\ \textgreater \ x=[0,1,2,3][/tex]