2019年春八年级数学下册第十七章勾股定理17.5实践与探索课件(新版)华东师大版.ppt

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1.一次函数与一元一次方程 任何一个以x为未知数的一元一次方程都可以变形为ax+b=0(a0)的形式,所以解一元一次方程,相当于在某个一次函数y=ax+b的函数值为 时,求自变量x的值. 2.一次函数与二元一次方程组 两个一次函数图象的交点坐标,就是这两个一次函数关系式组成的方程组的解.,17.5 实践与探索,0,

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