\infty) (1+\frac {3}{x})^3^x" alt="lim(x->\infty) (1+\frac {3}{x})^3^x" align="absmiddle" class="latex-formula">
1/t=3/x
t=3x
=lim(1+1/t)^(3*3x)=lim(1+1/t)^9
=e^9
\infty) (1+\frac {3}{x})^3^x" alt="lim(x->\infty) (1+\frac {3}{x})^3^x" align="absmiddle" class="latex-formula">