解方程:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2b23b939c642da68d5204a5cdabd66.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2b23b939c642da68d5204a5cdabd66.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73ef325c0c3151347cc5250259cee99.png)
23-24八年级上·黑龙江哈尔滨·期中 查看更多[8]
更新时间:2023-11-13 10:45:09
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,小明想要利用无人机测量他家附近一座古塔(
)的高度.在古塔所在的地平面上选定点
.在
处测得古塔顶端
点的仰角为
,小明遥控无人机悬停在点
正上方的
处时,测得古塔顶端
点的俯角为
,若此时无人机显示屏上显示其离地面的高度(
)为
.求古塔(
)的高度以及观测点到古塔的水平距离(
).(参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/903c1bb6f9fe8f9b9710683a3e601452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99483f83b7ea10579ef4e29899ea901b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba52ced0811df98fedb575535b24257b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2252ae7e8975c67a24ca325effe4abc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9450c05228aec381693237c56f1b41fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d0062f4f00732a0cf11d1ac145c218b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/25/439e8c50-c265-4076-b055-64c7770b9347.png?resizew=173)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知关于m的方程
的解也是关于x的方程
的解.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/1/00cfb588-505d-46d6-9388-4ffe116edfaa.png?resizew=359)
(1)求m、n的值;
(2)已知线段
在射线AB上取一点P,恰好使
=n,点Q为线段PB的中点,求AQ的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6232af0040b2be4921447acc99090526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80954b6ba72575441782aab5d74b1bbf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/1/00cfb588-505d-46d6-9388-4ffe116edfaa.png?resizew=359)
(1)求m、n的值;
(2)已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1fdd2f1b0e2eb877cf5e60476c2996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf6c7b71d5689f613d106a141b548434.png)
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
名校
【推荐2】对于任意有理数a,b,我们规定:
当a≥b时,都有a⊗b=a+2b;当a<b时,都有a⊗b=a﹣2b.
例如:2⊗1=2+2×1=2+2=4.
根据上述规定解决下列问题:
(1)计算:2⊗3= ;(﹣
)⊗(﹣1)= .
(2)若(x+3)⊗(x﹣3)=6,求x的值.
当a≥b时,都有a⊗b=a+2b;当a<b时,都有a⊗b=a﹣2b.
例如:2⊗1=2+2×1=2+2=4.
根据上述规定解决下列问题:
(1)计算:2⊗3= ;(﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)若(x+3)⊗(x﹣3)=6,求x的值.
您最近一年使用:0次