练习册

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    070]解:8．·················································································· (3)①当0时. ． ··································· ②当3时. =·································································································· ③当时.设与交于点． 过作则为等边三角形． ． ．··············································································· 如右图.过点作于点..于点 过点作交延长线于点． 又 又 ·················································································· 【查看更多】

     

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    精英家教网如图：已知∠B=∠C，AD=AE，则AB=AC，请说明理由（填空）
    解：∵在△AEB与△ADC中，
    --(已知)
    -------(         )
    --------(已知)

    ∴
     

    ∴AB=AC
     
    ．

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    14、如果不等式（m+1）x＞m+1的解集是x＜1，那么m必须满足（　　）

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    11、已知x=-2是方程2x+m-4=0的一个解，则m的值是
    8
    ．

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    已知
    x=3
    y=2
    是方程x+5ky=5k的一个解，则k的值是（　　）
    A、
    3
    5
    B、
    5
    3
    C、-
    3
    5
    D、-
    5
    3

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    不等式组
    x-2＞0
    x-1＜0
    的解集是
     
    ．

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