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(2016年兰州中考15题)如图1,A,B两点在反比例函数y=k_1/x的图像上,C,D两点在反比例函数y=k_2/x的图像上,AC⊥x轴于点E,BD⊥x轴于点F,AC=2,BD=3,EF=103,则k_2-k_1=().(A)4(B)143(C)163(D)6本题作为2016年甘肃省兰州市中考卷的第15题,选择题的最后一题.本题考查了反比例函数图像上的点的坐标的特征,笔者给出包括参考答案在内的多种解法.
(2016 Lanzhou senior high school entrance examination 15 questions) As shown in Figure 1, A, B two points in the inverse proportion function y = k_1 / x of the image, C, D two points in the inverse proportion function y = k_2 / x image, AC⊥x axis At point E, the BD ⊥ x axis at point F, AC = 2, BD = 3, EF = 103, then k_2-k_1 = (A) 4 (B) 143 (C) In 2016, Lanzhou City, Gansu Province, the first 15 questions in the test paper, the last question of the multiple choice questions.This question examines the characteristics of the coordinates of points on the inverse proportion function image, the author gives a variety of solutions, including reference answers.