x^3 + 4·x^2 - x - 4 > 0
(x + 1)·(x - 1)·(x + 4) > 0
---------------(-1)+++++++++++>x
-------------------------(1)++++++>x
------(-4)++++++++++++++++>x
Segno prodotto;
------(-4)+++(-1)----(1)+++++++>x
Soluzione:
-4 < x < -1 ∨ x > 1
Home
Profilo
Menu