此题如何算？[(2n+3)/(2n+1)]的n+1次方。当n趋向
[(2n+3)/(2n+1)]的n+1次方。当n趋向无穷大时的极限？
lim(1+1/x)^x=e(x趋向无穷大时) 故，[(2n+3)/(2n+1)]的n+1/2次方，当n趋向无穷大时的极限是e, [(2n+3)/(2n+1)]的1/2次方,是1. [(2n+3)/(2n+1)]的n+1次方。当n趋向无穷大时的极限e