AIDEZ moi svp MERCI D'AVANCE .... Pergunta de ideia dedoudou11804890

doudou11804890 @doudou11804890

December 2020 1 66 Report

AIDEZ moi svp
MERCI D'AVANCE

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caylus

Réponse :

Bonsoir,

Explications étape par étape

Le car d'Or est-il monté cette année?

ex_1

$A=a+\dfrac{a}{a} \\\\A^2=(a+\dfrac{a}{a} )^2=a^2+\dfrac{1}{a^2} +2\\\\a^2+\dfrac{1}{a^2} =A^2-2\\\\\\(A^2-2)^2=(a^2+\dfrac{1}{a^2})^2=a^4+\dfrac{1}{a^4} +2\\\\a^4+\dfrac{1}{a^4} =(A^2-2)^2-2$

ex_2

100-100=0 ==> S=0

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