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CC 2016-2017 Purpan


Go to solution Solved by Chat_du_Cheshire,

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Posted
il y a 48 minutes, miniature321 a dit :

je m'incruste mais j'aimerai savoir pourquoi la A est vraie; dans le lien ils ne parlent pas de la A.. @Chat_du_Cheshire

y'a plusieurs façon de faire je pense mais par exemple :

 

e^2x - 2e^x + 1 = e^x(e^x - 2) + 1, or e^x - 2 < 0  <=> e^x < 2 <=> x < ln(2), or ln(2) = 0,7 mais vu qu'on rajoute +1 c'est toujours positif^^

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