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CarolinaYumi
@CarolinaYumi
October 2020
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Determine os intervalos e faça a representação grafica :
(x²-1)(x+4) < 0
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Verified answer
(x²-1)(x+4) ≤ 0 equivale a (x+1)(x-1)(x+4)≤0
Os intervalos são:
--------------------------------------------1++++++++++++++++ (x-1)
--------------------------------(-1)++++++++++++++++++++++ (x+1)
-------------------(-4)++++++++++++++++++++++++++++++ (x+4)
--------------------0+++++++(0)---------0+++++++++++++++ (x+1)(x-1)(x+4)
S={x∈R / x ≤-4 ou -1 ≤ x ≤1 }
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Verified answer
(x²-1)(x+4) ≤ 0 equivale a (x+1)(x-1)(x+4)≤0
Os intervalos são:
--------------------------------------------1++++++++++++++++ (x-1)
--------------------------------(-1)++++++++++++++++++++++ (x+1)
-------------------(-4)++++++++++++++++++++++++++++++ (x+4)
--------------------0+++++++(0)---------0+++++++++++++++ (x+1)(x-1)(x+4)
S={x∈R / x ≤-4 ou -1 ≤ x ≤1 }