Question

rezolvati urmatoarele inecuatii unde x este numar natural a 2x+3<7 b 3x-7>2 c 4+5x<9 d 7x-2>19 e 3+9x<12 f 6x-8>22

Answer 1

a) 2x+3<7
2x<4
x<2
b) 3x-7>2
3x>9
x>3
c) 4+5x<9
5x<5
x<1
d) 7x-2>19
7x>21
x>3
e) 3+9x<12
9x<9
x<1
f) 6x-8>22
6x>30
 x>5

Answer 2

A 2x+3<7 2x < 7-3 2X<4 | :2 X<2 X={0,1} B 3x-7>2 3x>2+7 3x>9 | :3 X>3 X={4,5,6,7,8,9... +infinit} C 4x+5<9 4x<9-5 4x<4 |: 4 X<1 X={0} D 7x-2>19 7x>19+2 7x >21 |:7 X>3 X={4,5,6,7,...+infinit} E 3+9x<12 9x<12-3 9x<9 |: 9 X<1 X={0} F 6x-8>22 6x>22+8 6x>30 |: 6 X>5 X={5,6,7,8,9,...+infinit}