Question

$\lim_{n \to \infty} 1 - \frac{2* e^{x} }{x+ e^{x} } ;$

Answer 1

x→∞ lim2*e^x/(x+e^x)=2lime^x/e^x*(x/e^x+1)=2*lim1/(x/e^x+1)=2*1=2 pt ca
x/e^x→0
Atunci  limita l=1-2=-1