Question

.......................​

Answer 1

Răspuns:

Explicație pas cu pas:

f(x)=5-11x.

f(x+1)=5-11·(x+1)=5-11x-11=-6-11x.

f(x+1)-11≤6x, ⇒-6-11x-11≤6x, ⇒-11x-6x≤6+11, ⇒-17x≤17 |:(-17), ⇒x≥17:(-17), ⇒x≥-1

Deci x∈[-1;+∞)