1
/R
= 2(1 + 9
t
2
+ 9
t
4
)
1
/
2
(1 + 4
t
2
+ 9
t
4
)
-
3
/
2
,
1
/T
= 3(1 + 9
t
2
+ 9
t
4
)
-
1
.