指數與對數(17)
Author: 藍邦偉　老師

(1)(log_73)(log_74)≠1;

(2)(log_23)⁴(log_32)=(log_23)³[(log_23)(log_32)]=(log_23)³×1=(log_23)³≠4

(3)5^{log_53}=3;7^{log_73}=3

(4)左邊取常用對數得:log5^{log_67}=log_67×log5=\frac{log7}{log6}×log5

$ 右邊取常用對數得： log7^{log_65}=log_65×log7=\frac{log5}{log6}×log7 $

(5)log_{\sqrt{7}}\sqrt{5}=\frac{log\sqrt{5}}{log\sqrt{7}}=\frac{\frac{1}{2}log5}{\frac{1}{2}log7}=\frac{log5}{log7}

$ log_{49}25=\frac{log25}{log49}=\frac{log5²}{log7²}=\frac{2log5}{2log7}=\frac{log5}{log7} $

n = 1 (slider from 1 to 9, step 1)
A = (-5.984456487804875, 1.8379673951218423)
B: A + (3.3, 0)
D: A + (0, 1)
C: B + D - A
poly1, a, b, c, d = Polygon(A, B, C, D)