一道一次函数的题目http://www.baidu.com/baidu?tn=baidu&cl=3&word=%D2%D1%D6%AA%D2%BB%B4%CE%BA%AF%CA%FDy%3Dkx%2Bb%28k%A1%D90%29%B9%FD%285%2C4a%29%BA%CD%284%2C5a%29%C1%BD%B5%E3%2C%C7%F3%D2%BB%B4%CE%BA%AF%CA%FD%B5%C4%BD%E2%CE%F6%CA%BD 已知一
来源：学生作业帮助网 编辑：六六作业网 时间：2025/01/11 10:37:26
一道一次函数的题目http://www.baidu.com/baidu?tn=baidu&cl=3&word=%D2%D1%D6%AA%D2%BB%B4%CE%BA%AF%CA%FDy%3Dkx%2Bb%28k%A1%D90%29%B9%FD%285%2C4a%29%BA%CD%284%2C5a%29%C1%BD%B5%E3%2C%C7%F3%D2%BB%B4%CE%BA%AF%CA%FD%B5%C4%BD%E2%CE%F6%CA%BD 已知一
一道一次函数的题目
http://www.baidu.com/baidu?tn=baidu&cl=3&word=%D2%D1%D6%AA%D2%BB%B4%CE%BA%AF%CA%FDy%3Dkx%2Bb%28k%A1%D90%29%B9%FD%285%2C4a%29%BA%CD%284%2C5a%29%C1%BD%B5%E3%2C%C7%F3%D2%BB%B4%CE%BA%AF%CA%FD%B5%C4%BD%E2%CE%F6%CA%BD 已知一次函数y=kx+2(k≠0),过（5,4a）和（4,5a）两点,求一次函数的解析式...
一道一次函数的题目http://www.baidu.com/baidu?tn=baidu&cl=3&word=%D2%D1%D6%AA%D2%BB%B4%CE%BA%AF%CA%FDy%3Dkx%2Bb%28k%A1%D90%29%B9%FD%285%2C4a%29%BA%CD%284%2C5a%29%C1%BD%B5%E3%2C%C7%F3%D2%BB%B4%CE%BA%AF%CA%FD%B5%C4%BD%E2%CE%F6%CA%BD 已知一
把那个点带入,5k+2=4a,4k+2=5a
两个方程相减,可以得到k=-a=-2/9,解析式为y=-(2/9)x+2
y=-2x+2
怎么会是-2/9呢？5k+2=4a，4a移向要变号啊
两点代入得：5k+2=4a,4k+2=5a
所以，k=-2/9,a=2/9
所以 y=-2/9X+2
Y=-2/9X+2