解答:(1)解:∵an+2SnSn-1=0(n≥2),
∴Sn-Sn-1+2SnSn-1=0.---------(3分)
∴
-1 Sn
=2.1 Sn?1
又∵a1=1,---------------(5分)
∴Sn=
(n∈N+).---------------(7分)1 2n?1
(2)证明:∵Sn=
,∴f(n)=2n-1.--------------------------(8分)1 f(n)
∴bn=2(
)-1+1=(1 2n
)n-1.---------------------------------------(9分)1 2
Tn=(
)0?(1 2
)1+(1 2
)1?(1 2
)2+…+(1 2
)n-1?(1 2
)n=(1 2
)1+(1 2
)3+(1 2
)5+…+(1 2
)2n-11 2
=
[1-(2 3
)n].-------------------------------------------------------(11分)1 4
∴Pn=
+1 1×3
+…+1 3×5
---------------(13分)1 (2n?1)(2n+1)
=
(1?1 2
+1 3
?1 3
+…+1 5
?1 2n?1
)=1 2n+1
(1?1 2
)-------------------------------(14分)1 2n+1