Question

2x-11<7 rezolvati inecuatia

Answer 1

2x< 7+11-> 2x<18-> x< 18/2-> x< 9-> x apartine { 8,7,6,5,4,....}.Daca se cere in N adunci mergi pana la 0, daca in Z mergi pana la minus infinit, daca in N* pana la 1

Answer 2

modul 1:
$2x-11\ \textless \ 7 \\ 2x\ \textless \ 7+11 \\ 2x\ \textless \ 18 \\ x\ \textless \ \frac{18}{2} \\ x\ \textless \ 9$
modul 2:
$2x-11\ \textless \ 7 \\ 2x-11-(7)\ \textless \ 0 \\ 2x-18\ \textless \ 0 \\ 2*(x-9)\ \textless \ 0 \\ x-9\ \textless \ \frac{0}{2} \\ x-9\ \textless \ 0 \\ x\ \textless \ 0+9 \\ x\ \textless \ 9$