练习册

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    001]解:(1)抛物线经过点. ·························································································· 1分 二次函数的解析式为:·················································· 3分 (2)为抛物线的顶点过作于.则. ··················································· 4分 当时.四边形是平行四边形 ················································ 5分 当时.四边形是直角梯形 过作于.则 (如果没求出可由求) ····························································································· 6分 当时.四边形是等腰梯形 综上所述:当.5.4时.对应四边形分别是平行四边形.直角梯形.等腰梯形．·· 7分 及已知.是等边三角形 则 过作于.则········································································· 8分 =································ 9分 当时.的面积最小值为··································································· 10分 此时 ······················································ 11分 【查看更多】

     

    题目列表(包括答案和解析)

    （1）解不等式组
    x+1＞0
    x≤
    x-2
    3
    +2

    （2）如图，将直角边长为6的等腰Rt△AOC放在如图所示的平面直角坐标系中，点O为坐标原点，点C、A分别在x、y轴的正半轴上，一条抛物线经过点A、C及点B（-3，0）．
    求该抛物线的解析式．

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    如图，直线y=2x-2与x轴交于点A，抛物线y=ax2+bx+c的对称轴是直线x=3，抛物线经过点A，且顶点P在直线y=2x-2上．
    （1）求A、P两点的坐标及抛物线y=ax2+bx+c的解析式；
    （2）画出抛物线的草图，并观察图象写出不等式ax2+bx+c＞0的解集．

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    （1）解不等式组
    （2）如图，将直角边长为6的等腰Rt△AOC放在如图所示的平面直角坐标系中，点O为坐标原点，点C、A分别在x、y轴的正半轴上，一条抛物线经过点A、C及点B（-3，0）．
    求该抛物线的解析式．

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    如图，直线y＝2x－2与x轴交于点A，抛物线y＝ax2＋bx＋c的对称轴是直线x＝3，抛物线经过点A，且顶点P在直线y＝2x－2上．

    （1）求A、P两点的坐标及抛物线y＝ax2＋bx＋c的解析式；

    （2）画出抛物线的草图，并观察图象写出不等式ax2＋bx＋c＞0的解集．

     

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    （1）解不等式组数学公式
    （2）如图，将直角边长为6的等腰Rt△AOC放在如图所示的平面直角坐标系中，点O为坐标原点，点C、A分别在x、y轴的正半轴上，一条抛物线经过点A、C及点B（-3，0）．
    求该抛物线的解析式．

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