Question

Fie functia f: R⇒R, f(x)= 4x -3. Rezolvati in multimea numerelor naturale inecuatia f(x)/3 ≥ -2.

Answer 1

$\frac{4x-3}{3}\geq -2;\\4x-3\geq -6;\\ 4x\geq -3;\\ x\geq -\frac{3}{4};$

Answer 2

(4x-3)/3≥ -2.

4x-3≥ -2*3

4x-3≥ -6

4x≥ -6+3

4x≥ -3

x≥ -3/4=>x∈[-3/4, ∞)