已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c4ec7bc855123c4a46001fdab50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8acf1ebab5453ad0c1e2c891e8ae18e0.png)
更新时间:2024-02-25 14:52:40
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解答题-问答题
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【推荐1】如图,在平面直角坐标系中,已知A(0,a),B(b,0),C(3,c)三点,且a、b满足关系式:
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/c10a0924-059d-4875-a9c2-a77f92535cc5.png?resizew=159)
(1)求a、b的值;
(2)求四边形AOBC的面积;
(3)是否存在点P(m,-
m),使得△AOP的面积为四边形AOBC面积的2倍?若存在,求出点P的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585a6df7ba82256eb56b2c4617c9e21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25cf65bc10d1b37dd42a04eecd157d73.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/c10a0924-059d-4875-a9c2-a77f92535cc5.png?resizew=159)
(1)求a、b的值;
(2)求四边形AOBC的面积;
(3)是否存在点P(m,-
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
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【推荐2】如图,点O为坐标原点,四边形
为矩形,边
、
分别在x轴、y轴上,A
,
,且a、c满足
.
(2)把
沿
翻折,点B落在
处,线段
与x轴交于点D,求
的长;
(3)在平面内是否存在点P,使以A,D,C,P为顶点的四边形是平行四边形,若存在,请直接写出点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce43981e5251e382690797f24907de2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7db670015a46fe901512685c84c8639c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6499dc8171cf331649767a25f8aaed4.png)
(2)把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)在平面内是否存在点P,使以A,D,C,P为顶点的四边形是平行四边形,若存在,请直接写出点P的坐标;若不存在,请说明理由.
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解答题-计算题
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【推荐1】【概念学习】
现规定:求若干个相同有理数(均不等于0)连除的商的运算叫做除方.
比如:
,
等,类比有理数的乘方,我们把:
写作:
,读作“2的圈3次方”;
写作
,读作“
的圈4次方”.
一般地,把
写作
,读作“a的圈n次方".
【初步探究】
(1)直接写出计算结果:
________,
________;
【深入思考】
我们知道,有理数的减法运算可以转化为加法运算,除法运算可以转化为乘法运算,那么有理数的除方运算如何转化为乘方运算呢?
除方
整式幂的形式
(2)归纳:请把有理数
的圈
次方写成幂的形式为:
________;
(3)利用(2)中的结论,计算:
.
现规定:求若干个相同有理数(均不等于0)连除的商的运算叫做除方.
比如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbfa18465de74e7a3a414704f38ba39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e2f110a2e0da0007ee61e1feb7472f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbfa18465de74e7a3a414704f38ba39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62ba56692ea408c868037cb082c5d76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e2f110a2e0da0007ee61e1feb7472f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e4d31538e625eab2933e3fc0e8009d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04081f8b8054788649a10089b438cfea.png)
一般地,把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5282c0f7b1ebb63a2cfe26ae7f7cda8.png)
![](https://img.xkw.com/dksih/QBM/2023/9/30/3336072614117376/3355119352160256/STEM/c24024f1a12540a4bd6d14037568fe13.png?resizew=21)
【初步探究】
(1)直接写出计算结果:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cc406eddb7eef08b76ad3fa5612776b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e47c0cd64e78b897e4aa1a78dda7e9.png)
【深入思考】
我们知道,有理数的减法运算可以转化为加法运算,除法运算可以转化为乘法运算,那么有理数的除方运算如何转化为乘方运算呢?
除方
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24270ebe6e4f48c8be38cff50d2c0f68.png)
(2)归纳:请把有理数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a12ea6f9d2bbcc5a3d7980dbe79922d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae0b861522b18be1753acc4474cbc9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc2a3629694959ce7eaf6c03a45be8cd.png)
(3)利用(2)中的结论,计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e7947aa6c2ee6d838df27de0a766750.png)
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解答题-问答题
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【推荐2】若
互为相反数,
互为倒数,且
的立方等于它本身.
(1)若
,求
的值;
(2)若
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a475fec8ded321e10a6697319fb975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf53cfe7c4e57e3544b3a7a4a5a3eeb5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d00d9639803852c8285661413b4c8a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18688b0a0784c0a22e75ab824a91a6b7.png)
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名校
【推荐1】为了给同学们创造一个良好的阅读氛围,某校准备在校区内建造一间城市书吧,书吧内设4个功能区,为了更好的区别这些功能区,安排施工队将地面上铺砖,地面结构如图所示,根据图中的数据(单位:
),解答下列问题:
(1)用含
,
的代数式表示地面总面积;
(2)当
,
时,若铺
地砖的平均费用为25元,那么铺地砖的总费用为多少元?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8584ac94ab143ac6f22c13ee79b70294.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/17/4499cea6-788b-4454-8e3c-fca1449ccca7.png?resizew=156)
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【推荐2】若a、b互为相反数, c是最小的非负数, d是最小的正整数, 求(a+b)d+d-c的值.
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