@ @¶ìÿa@óÝy‹¾a@ u@ @RTX
(.)
: 1, 1 , 1 , 1 , … ()
4 9 16
( ) ()
() ( )
. 31 110 20 ()
3() 2( ) −1 ( ) −2 ( )
an = 71 − 7n {bn } {an } ()
2 ()
.bn = 2 ×(−3)n−1
()
()
{bn } {an } ( )
{bn } {an } ( )
[MAΘ 1991]
46 18
4 () 1( ) 2( ) 1 ()
3 3 3
4 [MAΘ 1992]
()
. 16