U9
)
ay=3x2
類題 28 若數列(an)滿足 dj = 1, Unit1 = n. an 'ne N' us
a = 1
Az= 1x
G3 = 2x1
題題29 數列(an),若
ai = 4, an+1
列若
-an'nEN, I a, = 6n
,則 = Gn
a5=4x6
n+2
-
-
n
n
n
pn (n+1)
3 A = 4
+
0 Az = 1+2 x 4 = 12
4 |
Az - 2x2
- x 12 = 24
範例 8 平移成等比的遞迴
day = pan, +q的遞迴關係我們可以處理,但要先