> 数学 >
1-
2
3
-
2
9
-
2
27
-
2
81
-
2
243
-
2
729
=______.
人气:207 ℃ 时间:2019-12-19 07:19:26
解答
1-
2
3
-
2
9
-
2
27
-
2
81
-
2
243
-
2
729

=1-(
2
3
+
2
9
+
2
27
+
2
81
+
2
243
+
2
729
),
=1-(1-
1
3
+
1
3
-
1
9
+
1
9
-
1
27
+
1
27
-
1
81
+
1
81
-
1
243
+
1
243
-
1
729
),
=1-(1-
1
729
),
=1-1+
1
729

=
1
729
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版