Question

Am nevoie foarte repedèee
nu am stiut la 8/b,2,4, merssii​
va rog mai repede macar 8/b va roggggg

Answer 1

2. C

4. C

8. b)

$e(x) \geqslant f(x) \\ x ^{2} + 6x - 3 \geqslant x ^{2} + 2x + 9 \: (scazi \: x ^{2} ) \\ 6x - 3 \geqslant 2x + 9(scazi \: 2x) \\ 4x - 3 \geqslant 9(aduni \: 3) \\ 4x \geqslant 12 (imparti \: la \: 4)\\ x \geqslant 3$

x€[3,+infinit)