指數與對數(1)
Author: 藍邦偉　老師

xy³=1000⇒log(xy³)=log1000

⇒logx+3logy=3

表在logx,logy平面通過(3,0)與(0,1)的直線

n = 0 (slider from 0 to 4, step 1)
A = (-0.94, 0.42)
B: A + (1, 0)
C: A + (0, 0.6)
D: B + C - A
poly1, b, d, c, a = Polygon(B, D, C, A)