−
=
!" # $ % &&'( ) "$% ,&-% )
* *
+ +
#
.
# 0 1
#
[
)( +
= −( −
=∏ =
]
)−
− ∑ =
+
#
−
/ −
(
"/ # +
−
∏ = +
+
)
−
− ∑ =
−
∏ = +
−∆
=
=∑ =
=∑ =
# # /
# #
# ## #
/ # #
−
3 #
<
/
=
−
#
2