Question

10x-15 sobre 5-4x maior ou igual a 0

Answer 1

Resposta:

(10x-15)/(5-4x) ≥ 0    .....x≠5/4

p=10x-15  ..a=10>0 ..raiz=15/10=3/2

p------------------------(3/2++++++++++++++++++++++

q=5-4x  ..a=-4< 0  ....raiz =5/4

q+++++++++++++++++++(5/4)-----------------------------

Estudo de sinais:

p----------------------------------(3/2)++++++++++++++++++++++++++++

q++++++++(5/4)----------------------------------------------

p/q-----------(5/4)+++++++++(3/2)----------------------------

(5/4,3/2]   é a resposta