解题方法
1 . 在平面直角坐标系
中,直线l与抛物线
相交于A、B两点.
(1)求证:“如果直线l过点
,那么
”是真命题;
(2)命题:“如果
,那么直线l过点
”,判断它是真命题还是假命题,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
(1)求证:“如果直线l过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c36fdf8a7898c1765d66891571666c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5cfb4b776b754b9445daa9e2c0544fe.png)
(2)命题:“如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5cfb4b776b754b9445daa9e2c0544fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c36fdf8a7898c1765d66891571666c.png)
您最近一年使用:0次
2022-04-20更新
|
118次组卷
|
2卷引用:上海理工大学附属中学2021-2022学年高二下学期期中数学试题
解题方法
2 . 如图,在平面直角坐标系
中,已知抛物线
的焦点为
,点
是第一象限内抛物线
上的一点,点
的坐标为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f81a0780efb9c7e876d88a8332a548.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/b4e5a65f-7b27-4271-9de9-b0b898fa845b.png?resizew=159)
(1)若
,求点
的坐标;
(2)若
为等腰直角三角形,且
,求点
的坐标;
(3)弦
经过点
,过弦
上一点
作直线
的垂线,垂足为点
,求证:“直线
与抛物线相切”的一个充要条件是“
为弦
的中点”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/a6f81a0780efb9c7e876d88a8332a548.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/b4e5a65f-7b27-4271-9de9-b0b898fa845b.png?resizew=159)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0011463a8939995c2a498c6b0918c8eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae969dfd9f4fae0fbff6bc4dc02812b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdf60f0d7f4060b1eb05db39438fc519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c62d9a936bf146bc7410ebc8f5b1d0cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf25e032b5599ac49383de06e776365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2020-02-29更新
|
698次组卷
|
2卷引用:2020届上海市杨浦区高三第一次模拟(期末)数学试题