對數函數的圖形(1)
Author: 藍邦偉  老師

x

y

y=log_2x

y=-log_2x

y=log_2(-x)

y=-log_2(-x)

y=log_2|x|

y=|log_2x|

參考線

|y|=log_2x

對數函數的圖形(1)

y=log_2x

y=log_{\frac{1}{2}}x=-log_2x

$ y=log_2(-x) $

$ y=-log_2(-x) $

y=log_2|x|

y=|log_2x|

$ |y|=log_2x $

|y|=log_2x

A = Corner(1)
B = Corner(3)
C: (x(A), 0)
D: (x(B), 0)
u = Vector(C, D)
E: (0, y(A))
F: (0, y(B))
v = Vector(E, F)
f_2(x) = ld(x)
a = false
g_2(x) = -f_2(x)
b = false
h_1(x) = ld(-x)
c = false
k(x) = -h_1(x)
d = false
f_1(x) = ld(abs(x))
g = false
g_1(x) = abs(ld(x))
h = false
P = Intersect(f_2, e_1, (2, 1))
Q = Intersect(g_2, e_1, (0.4999999976351376, 1.0000000068235506))
i_1 = OrthogonalLine(P, u)
j_1 = OrthogonalLine(Q, u)
S = Intersect(s, t)
U = Intersect(j_1, s)
V = Intersect(i_1, s)
n_1 = Segment(Q, U)
p_1 = Segment(P, V)
f = false
r_1 = Function(-ld(x), 1, 100)
r = Function(ld(x), 1, 1000)
T_1 = Corner(1)
T_4 = Corner(4)
T_2: (3 * Corner[1] + Corner[2]) / 4
T_3: (3 * Corner[4] + Corner[3]) / 4
多邊形1, t_1, t_2, t_3, t_4 = Polygon(T_1, T_2, T_3, T_4)
e_2 = Segment(T_2, T_3)
e = false

Tool: 2D-AXIS (command 工具1)
2D-Axis
Input: A, B, C, D, E, F
Output: u, v

x

y

C: (x(A), 0)
D: (x(B), 0)
u = Vector(C, D)
E: (0, y(A))
v = Vector(E, F)