Calcular o valor de a² + 1/a²,sabendo que :a + 1/a =5.... Pergunta de ideia deHuehue180

Huehue180 @Huehue180

December 2019 1 71 Report

Calcular o valor de a² + 1/a²,sabendo que :a + 1/a =5

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exalunosp A + 1/a = 5
elevando ao quadrado tudo
( a + 1/a)² = 5²
(a)² + 2.a.1/a + (1/a)² = 25
a² + 2a/a + 1/a² = 25
Nota 2a/a = 2
a² + 2 + 1/a² = 25
a² + 1/a² = 25 - 2
a² + 1/a² = 23 ****

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