Use the method of cylindrical shells to find the volume generated by rotating the region bounded by the given curves about the y-axis.
$y= 27e^x$, $y= 27e^{-x}$, $x = 1$.
Use the method of cylindrical shells to find the volume generated by rotating the region bounded by the given curves about the y-axis.
$y= 27e^x$, $y= 27e^{-x}$, $x = 1$.