通过变换求解线性方程

通过变换求解线性方程
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2016-03-04 00:53
本范例演示如何通过图形变换直观理解线性方程组的解法。涉及的核心数学概念包括线性方程、变换、交点求解。作图要点使用了GeoGebra的Textfield、Intersect、Step、m_2、b_1、m_1、b_2、inputBoxm_1、inputBoxb_1、inputBoxm_2、inputBoxb_2、Transform_5、NoSolution、equalsX、AnyReal、Transform_1、Space、Comma、reset、Yzoom、Xzoom、Transform_3、Transform_2、trans5、Transform_4、trans1、trans3、trans2、trans4、f1、f2、fa、c、F1x、F1y、F1x_1、F1y_1、F2x、F2x_1、F2y、F2y_1、Fax等命令和对象。适合高中数学教学和自主学习,帮助理解线性方程组的几何意义和解法步骤。

GeoGebra 命令及参数

  1. Textfield(m_1) → inputBoxm_1
  2. Textfield(b_1) → inputBoxb_1
  3. Textfield(m_2) → inputBoxm_2
  4. Textfield(b_2) → inputBoxb_2
  5. Intersect(f1, x = (0.7 * Xzoom), (14, 9)) → F1x
  6. Intersect(f1, y = (0.7 * Yzoom), (-1.2000000000000002, 1.4)) → F1y
  7. Intersect(f1, x = (-0.7 * Xzoom), (-14, -5)) → F1x_1
  8. Intersect(f1, y = (-0.7 * Yzoom), (-6.8, -1.4)) → F1y_1
  9. Intersect(f2, x = (0.7 * Xzoom), (14, -31)) → F2x
  10. Intersect(f2, x = (-0.7 * Xzoom), (-14, 25)) → F2x_1
  11. Intersect(f2, y = (0.7 * Yzoom), (-2.2, 1.4)) → F2y
  12. Intersect(f2, y = (-0.7 * Yzoom), (-0.8, -1.4)) → F2y_1
  13. Intersect(fa, x = (0.7 * Xzoom), (14, 9)) → Fax
  14. Intersect(fa, x = (-0.7 * Xzoom), (-14, -5)) → Fax_1
  15. Intersect(fa, y = (0.7 * Yzoom), (-1.2000000000000002, 1.4)) → Fay
  16. Intersect(fa, y = (-0.7 * Yzoom), (-6.8, -1.4)) → Fay_1