Question

Fie functia f: R->R, f(x)=5-4x supra 3. Rezolvati inecuatia f(x)+2< f(5 supra 4)

Answer 1

Răspuns:

f(5/4)=

$\frac{5 - 4 \times \frac{5}{4} }{3} = 0 \div 3 = 0$

f(x+2)=

$\frac{5 - 4x}{3} + \frac{2}{1} = \frac{5 - 4x}{3} + \frac{6}{3} = \frac{5 - 4x + 6}{3} = \frac{11 - 4x}{3}$

Obtinem

$\frac{11 - 4x}{3} < 0 \\ 11 - 4x < 0 \\ - 4x < - 11 \\ x > \frac{11}{4}$

$per Ca te-am ajutat

Answer 2

Răspuns:

Explicație pas cu pas: