请观察下列等式的规律:
=
(1﹣
),
=
(
﹣
),
=
(
﹣
),
=
(
﹣
),
…
则+
+
+…+
= .
请观察下列等式的规律:
=
(1﹣
),
=
(
﹣
),
=
(
﹣
),
=
(
﹣
),
…
则+
+
+…+
= .
解:
+
+
+…+
=(1﹣
)+
(
﹣
)+
(
﹣
)+…+
(
﹣
)
=(1﹣
+
﹣
+
﹣
+…+
﹣
)
=(1﹣
)
=×
=.