Bolton Pollard
06/11/2024 · High School
19 On considère la fonction \( f \) définie sur \( ]-\infty ;-1[\cup]-1 ;+\infty\left[\operatorname{par} f(x)=\frac{x^{2}+3 x}{x+1}\right. \). 1. Justifier qu'en l'infini la limite est une forme indéter- minée. 2. Factoriser et simplifier \( f(x) \) et déterminer les limites en \( -\infty \) et en \( +\infty \).
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1. La limite de \( f(x) \) en \( +\infty \) et \( -\infty \) est indéterminée.
2. \( f(x) = x \cdot \frac{x + 3}{x + 1} \) pour \( x \neq -1 \). La limite en \( +\infty \) est \( +\infty \) et en \( -\infty \) est \( -\infty \).
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