指數與對數(18)
Author: 藍邦偉　老師

$ log_5(log_3n)=2=log_525 $

$ ⇒log_3n=25 $

⇒n=3^{25}

⇒logn=log3^{25}

=25log3

$ =25×0.4771 $

=11.9275

n的首數是11，故n是12位數

n = 0 (slider from 0 to 9, step 1)
A = (-5.50051787317073, 8.302004604878038)
B: A + (0.9, 0)
D: A + (0, 0.8)
C: B + D - A
poly1, a, b, c, d = Polygon(A, B, C, D)