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LynaLiliLola26032202
@LynaLiliLola26032202
January 2021
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Bonsoir svp c'est quoi la limite de
lim
x→+∞ (x + 1)/ (2 − cos x)
et
lim
x→+∞ x^2 + x sin (x)
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kartonplein
A)
-1 < cos x < 1
=>-1<-cos x < 1
=> 1 <2-cos x < 3
Le dénominateur reste tout le temps compris entre 1 et 3 alors que l numérateur ne cesse de croitre. La limite est donc +∞
b)
x^2 + x sin (x) = x(x+sin x)
sin(x) est compris entre -1 et 1
x + xin(x) tends vers +∞ quand x tend vers +∞
donc x(x+sin x) tends vers +∞ quand x tend vers +∞
J'espère que cela t'aide :)
2 votes
Thanks 1
LynaLiliLola26032202
merciii
kartonplein
Je t'en prie
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Lista de comentários
-1 < cos x < 1
=>-1<-cos x < 1
=> 1 <2-cos x < 3
Le dénominateur reste tout le temps compris entre 1 et 3 alors que l numérateur ne cesse de croitre. La limite est donc +∞
b)
x^2 + x sin (x) = x(x+sin x)
sin(x) est compris entre -1 et 1
x + xin(x) tends vers +∞ quand x tend vers +∞
donc x(x+sin x) tends vers +∞ quand x tend vers +∞
J'espère que cela t'aide :)