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tatahtinha2009
@tatahtinha2009
October 2020
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para que valor de X a sequência (x-4; 2x; x+2) é uma P.A?
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Lucas7XD
Verified answer
Vamos lá,
2x-(x-4)=(x+2)-2x
2x-x+4=x+2-2x
x+4=x+2-2x
x+4=-x+2
x+x=2-4
2x=-2
x=-2/2
x=-1
(-1-4,2.-1,-1+2)
(-5,-2,1)
=====================
O valor de x tem que ser igual a -1
5 votes
Thanks 8
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Lista de comentários
Verified answer
Vamos lá,2x-(x-4)=(x+2)-2x
2x-x+4=x+2-2x
x+4=x+2-2x
x+4=-x+2
x+x=2-4
2x=-2
x=-2/2
x=-1
(-1-4,2.-1,-1+2)
(-5,-2,1)
=====================
O valor de x tem que ser igual a -1