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Estevaomelo
@Estevaomelo
December 2019
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Sabendo que ( x +1/x ) ² = 12 , determine 1/x² + x²
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exalunosp
(x + 1/x)² = 12
( x)² + 2 . x . 1/x + (1/x)² = 12
x² + 2x/x + 1/x² = 12
cortando x de 2x/x
x² + 2 + 1/x² = 12
x² + 1/x² = 12 - 2
x² + 1/x² = 10 ***** resposta
ou
1/x² + x² = 10 ***
26 votes
Thanks 38
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Lista de comentários
( x)² + 2 . x . 1/x + (1/x)² = 12
x² + 2x/x + 1/x² = 12
cortando x de 2x/x
x² + 2 + 1/x² = 12
x² + 1/x² = 12 - 2
x² + 1/x² = 10 ***** resposta
ou
1/x² + x² = 10 ***