已知
,
.
(1)计算B的表达式;
(2)求出
的表达式;
(3)小强同学说:“当
时和
时,(2)中的结果都是一样的”,你认为你对吗?若
,
,求(2)中式子的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca667eec409c31a6e3c40cc57426874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffea70b193f76a6cdade1fb9c776f96.png)
(1)计算B的表达式;
(2)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13c8573cf2fff14ab3c22a56536d8e1.png)
(3)小强同学说:“当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322fea53a167d0c6c8a9697b4f011fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7055c7288940a27d18dfd7a3fe7ef2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f01281f38c1168109c2cc0542acca11b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7e2dff6f0b80dedaddc4c69ee0c61d.png)
更新时间:2018-11-24 09:01:02
|
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解答题-计算题
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适中
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【推荐1】已知
,
,按要求完成下列各题:
(1)若
的结果是一个一次多项式,求a的值;
(2)当
时,先化简
再代入求值,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c452b6933752b78b9d78d0c3c47f0255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ee91acd02d94135862f67a58a125dc6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce69cd33d105ce280170f0cd0513026.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8e1dd8da540badcb9a8f427c5b202e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9e460c144f7a2141d2df0308b125f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
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适中
(0.65)
名校
【推荐3】已知多项式
是关于x的二次多项式,且二次项系数为b,数轴上两点A,B对应的数分别为a,b.
(1)a=___________,b=___________,线段AB=___________;
(2)若数轴上有一点C,使得
,点M为
的中点,求
的长;
(3)有一动点G从点A出发,以1个单位每秒的速度向终点B运动,同时动点H从点B出发,以
个单位每秒的速度在数轴上作同向运动,设运动时间为t秒(
),点D为线段
的中点,点F为线段
的中点,点E在线段
上且
,在G,H的运动过程中,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80a6c297c50d22b9a0564281d436e823.png)
(1)a=___________,b=___________,线段AB=___________;
(2)若数轴上有一点C,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db15c0b20a0b42e2c78c16c8939371fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
(3)有一动点G从点A出发,以1个单位每秒的速度向终点B运动,同时动点H从点B出发,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589dca7ce76db8a40c22d06ab830ae13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b1679ddd08cac164231d5f0152c342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f26e79ed20d6c4eac8607f4adf3a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1043e44e1853b026578712d652d403.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/23/f025b459-6f2e-4064-9840-a1fae242bc26.png?resizew=324)
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