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7 1 直线方程和简单的线性规划内容概述1 在平面直角坐标系中 ,常用的直线普通方程形式有点斜式、斜截式、两点式、截距式和一般式Ax+By+C =0五种 ,求直线方程常用待定系数法 .2 过两点 (x1,y1)、(x2 ,y2 ) ,倾斜角为α(α ≠π2 )的直线的斜率可以用斜率公式k =tanα =y2 -
7 1 Linear Equations and Simple Linear Programming Contents Overview 1 In the rectangular Cartesian coordinate system, the commonly used straight ordinary equations are slightly skewed, truncated, two-pointed, intercepted, and general Ax+By+C=0. Five kinds, find the linear equation commonly used undetermined coefficient method. 2 Over two points (x1, y1), (x2, y2), the slope of the slope of the α (α ≠ π2) of the slope can use the slope formula k = tanα = y2 -