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已知一次函数y=kx+b的图象经过点A(2,0),与y轴交于点B(0,4). (1)求一次函数的表达式;并在平面直角坐标系内画出该函数的图象; (2)当x=-5时,求函数y的值;并求出图像与两坐...
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教案备课库《八(二)年级数学作业18.3.5求一次函数的关系式》真题及答案
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