Question

fie functia f;R-R unde f(x)=2x-1.Rexolvati ecuatia f(x)mai mic sau egal f(-2) x-apartine lui R

Answer 1

f(-2)=2×-2-1= -4-1= -5
f(x) =<f(-2)
2x-1=< -5
2x=< -5+1
2x=< -4
x=< -4/2
x=< -2 aparţine lui R