1 . 化简:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce9f111085bc69bb899dcea97df7c100.png)
您最近一年使用:0次
2 . 用简便方法计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d34cf67d6f9829cbc385214e2b1a926.png)
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d34cf67d6f9829cbc385214e2b1a926.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c986fa4c7368114451503ab518ce5d16.png)
您最近一年使用:0次
3 . 计算:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3911a01f7f9a6f412b78118117dc480.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ec422993b59f0d9cb6908e31905ec9.png)
您最近一年使用:0次
2024-04-28更新
|
207次组卷
|
2卷引用:2023年江苏省无锡市梁溪区连元英禾双语学校中考数学模拟预测题5月份)
4 . 计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd30f647fa04e28c55a74b0c1145827.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd30f647fa04e28c55a74b0c1145827.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85743257de1aecc191e327302a4376d.png)
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5 . 先化简,再求值:
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04329cf7057bd3cb0e46334194503653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2d8deaa8b7d95779fd6c0804958dc0.png)
您最近一年使用:0次
6 . 计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7904d5c51f97cf79c1c449ee4186756.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ab026dca8593b7075110f5d94b2e43.png)
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913a73d42189d46df539288988d63695.png)
(4)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7904d5c51f97cf79c1c449ee4186756.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ab026dca8593b7075110f5d94b2e43.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913a73d42189d46df539288988d63695.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277595cd509bc999c81ba50c4228ffd2.png)
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7 . 【计算】
小红计算
时,得到的结果是
,则“
”表示的数为 .
【发现】
小红对计算结果
很感兴趣,她发现有些数A可以表示成
(x、y为自然数)的形式,她把这类数称为“神秘数”,例如:
,
,
…,所以3,19,327是“神秘数”.请写出两个10以内的“神秘数”(不包含3): , .
【探究】
小红进一步研究,发现像19,327这样的“神秘数”可以用两个连续奇数按发现中给出的运算表达出来,她把这些“神秘数”称为“双奇神秘数”.试说明所有“双奇神秘数”被4除余3.
若两个“双奇神秘数”的差是12,则这两个“双奇神秘数”是 和 .
小红计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9202de990c79d2f4889766ce9f8bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf9bb992b634d2ed82c1e65c090bfc27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895c0c7fd9c7ec3c84de9f32d0ad985c.png)
【发现】
小红对计算结果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf9bb992b634d2ed82c1e65c090bfc27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcb1e45b760325b0323ecf9c4f2a2d0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b415be03b5add148e98c01ba80bde3e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33dbbfeaff7d972fcee988ab86624637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f17935be548d44d719a03ef6b40b837.png)
【探究】
小红进一步研究,发现像19,327这样的“神秘数”可以用两个连续奇数按发现中给出的运算表达出来,她把这些“神秘数”称为“双奇神秘数”.试说明所有“双奇神秘数”被4除余3.
若两个“双奇神秘数”的差是12,则这两个“双奇神秘数”是 和 .
您最近一年使用:0次
8 . 先化简,再求值:
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e0f4d39ca258aaa95c79ab21c5d0a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
您最近一年使用:0次
9 . 计算:
(1)
.
(2)
.
(3)
.
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63698b370bce85fc917144408cefd3c9.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1808dba6f97e7a8f7f70fa94cccfa141.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aded12b163b8df1b623046e4a2d4d2f3.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79eb918652b132ca4849502496809979.png)
您最近一年使用:0次
名校
10 . 阅读下列材料:
若x满足
,求
的值.
解∶ 设
,
, 则
,
, ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae481192fc1b0fc30cd450c9af0b403a.png)
请仿照上面的方法求解下面的问题:
(1)若x满足
,求
的值:
(2)已知正方形
的边长为x, E、 F分别是
上的点,且
, 长方形
的面积是 60, 分别以
为边长作正方形
和正方形
,求图中阴影部分的面积.
若x满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b0709acafe60e5c43a38508bccbbc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c373f92cf5ca2234c3215a3ec877d761.png)
解∶ 设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa055db427ecba2024847c4fc79195bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b74134105b4afa2470945461b8c1dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d08c270ef60c7a152e9a5b68916176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b06fa1a255044bcbcbf3042055be9957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae481192fc1b0fc30cd450c9af0b403a.png)
请仿照上面的方法求解下面的问题:
(1)若x满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6928d797ef18a06a7b3e1776b939b68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39efb9e3722e3ffc91847f226545045.png)
(2)已知正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed86911acfc988cd24508976ca8afc94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394ae06fe8d43c2331eee0f54798f0c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c33132a7eb57dce564b3a2ffc8a202a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11dda8b3559a7c89ebe9b3e2038b5739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b60e62fdf0e3296a2a3e9e2b99f0f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d0607ea02f8fe4cd4ca8098e55f8f8d.png)
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