Question

(x+2)*(4-x)
--------------≥0
         x
Решите неравенство

Answer 1

ОДЗ

x≠0

-(x+2)(x-4)≥0

(x+2)(x-4)≤0

x=-2 x=4

_ + _ +

_____-2______0______4_______

(-oo;-2]U(0;4]