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lim when x->-infinity

Petrus

Well-known member
Feb 21, 2013
739
Hello MHB,
I got stuck on this limit
\(\displaystyle \lim_{x->-\infty}x^2e^x\)

progress:
I did rewrite that as
\(\displaystyle \frac{e^x}{\frac{1}{x^2}}\) and then did variabel subsitution \(\displaystyle t=\frac{1}{x^2}\) but that did not work well,

Regards,
\(\displaystyle |\pi\rangle\)
 

ZaidAlyafey

Well-known member
MHB Math Helper
Jan 17, 2013
1,667
Try \(\displaystyle \frac{x^2}{e^{-x}}\)
 

Petrus

Well-known member
Feb 21, 2013
739
Try \(\displaystyle \frac{x^2}{e^{-x}}\)
Hello Zaid,
Thanks once again and many thanks for the fast responed! Now I solved it with l hopitals rule!:) Cleaver!!!

Regards,
\(\displaystyle |\pi\rangle\)