观察判别该数列的敛散性；若收敛，求其极限值：[tex=2.786x1.214]xzBHqimDcrXeAGkx7lfIqQ==[/tex]（a为常数）
举一反三
- 观察判别下列数列的敛散性；若收敛，求其极限值：[tex=2.786x1.214]oR5zzv7jL0o7R1sgrP0iyQ==[/tex]([tex=0.571x0.786]WLga5RWgrUta8vWDwROpYA==[/tex]为常数) .
- 观察判别该数列的敛散性；若收敛，求其极限值：[tex=4.571x2.357]hAUuoQFiuHB7dqm2w8KkhafbOz0UENVmVgtJtorgLoE=[/tex]
- 观察判别该数列的敛散性；若收敛，求其极限值：[tex=6.071x1.357]T3N+yWOHGvsSj9Ef2K+pE28XLF6tGdPGR8km3xQ7VMs=[/tex]
- 观察判别该数列的敛散性；若收敛，求其极限值：[tex=6.714x2.786]OtSWr5xORxPZhaX1Ca59sfyG2QRR5eat6vhegg1QFTMOIWAGtkNqJPi0xGa2D0vy[/tex]
- 观察判别该数列的敛散性；若收敛，求其极限值：[tex=4.5x2.5]rqYuK/xoT9qkiV/V7uMyH0cNWZfVdmxj03JvrUp5c/8=[/tex]