对数函数图像绘制：通过指数函数与对数函数的关系展示对数概念

GeoGebra 命令及参数

1. Element(l7, n) → a
2. Segment(C, D) → s
3. Segment(Rotate[I, -90°, O], Rotate[I, 90°, O]) → k
4. Mirror(I, O) → I'
5. Textfield(f) → InputBox2
6. TableText({tx, text3}, {tx3, If[o1, t3, ""]}, {tx2, If[o1, t2, ""]}, {tx1, If[o1, t1, ""]}, {tx0, If[o1, t0, ""]}, {-1, If[o1, t1', ""]}, {-2, If[o1, t2', ""]}, {-3, If[o1, t3', ""]}, "|_") → text16
7. If(a ≠ 1, (log(a, y(Corner[3])), y(Corner[3])), (x(Corner[3]) - 2, 1)) → F
8. TableText({tx, text3_{4}}, {t3, If[o1', tx3, ""]}, {t2, If[o1', tx2, ""]}, {t1, If[o1', tx1, ""]}, {t0, If[o1', tx0, ""]}, {t1', If[o1', "-1", ""]}, {t2', If[o1', "-2", ""]}, {t3', If[o1', "-3", ""]}, "|_") → text16_{1}