解答题-计算题 较难0.4 引用5 组卷627
请先阅读下列一组内容,然后解答问题:
∵
;
;
;….
,
∴
+
+
+…+![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a43b7f67537c450907647a1c1a53e18.svg)
=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/239f4642717744b7e20dcc457ebcc92a.svg)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0530e63b5c126986f2d5f81ea7714bef.svg)
…![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b869a5d444254ceb2d73c8cb56f82490.svg)
=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a5243c910eec9eedf2ae9a4d98875b.svg)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd014086704652fe8e9d9924615dfa00.svg)
…
.
计算:
(1)
+
+
+
…+
;
(2)已知|a﹣1|与|b﹣2|互为相反数,求:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b26fb36af9ba008cfc24992679a58e1.svg)
.
(3)
+
+
+…+
.
∵
∴
=
=
计算:
(1)
(2)已知|a﹣1|与|b﹣2|互为相反数,求:
(3)
20-21七年级上·湖北咸宁·阶段练习
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