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Concours blanc 2018


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Bonjour, 

Dans le QCM 2, item D du concours blanc de maths 2018, je ne comprends pas comment on peut affirmer que la fonction est paire.

La fonction est la suivante

 

f(x)= \frac{7x^5-3x}{3x+4}

 

Pour moi

f(-x)=\frac{7-x^5-3*(-x)}{3*-(x)+4} \neq f(x)

 

Quelqu'un peut-il m'éclairer ? 

 

Merci ! ? 

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