supermimi98401 supermimi98401
  • 20-09-2019
  • Mathematics
contestada

Write down all elements of the set {XER: X3 -x = 0).

Respuesta :

lublana
lublana lublana
  • 23-09-2019

Answer:

{-1,0,1}

Step-by-step explanation:

We are given that a set

Suppose A={[tex]x\in R:x^3-x=0[/tex]}

We have to find the all elements of given set

First we solve the given equation

[tex]x^3-x=0[/tex]

[tex]x(x^2-1)=0[/tex]

[tex]x(x+1)(x-1)=0[/tex]

Using the identity:[tex]x^2-y^2=(x+y)(x-y)[/tex]

Substitute each factor equal to zero to find the value of x

[tex]x=0,x-1=0\implies x=1,x+1=0\implies x=-1[/tex]

Hence, the elements in the given set={-1,0,1}

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