Question

Dik: F(x)= 2x - 5
G(x) = 3x + 8
Ditanyakan a. Fpangkat -1 (x)
B. G pangkat -1 (x)

Answer 1

G(-1)= 3.-1 + 8 =4
F(-1) = 2. -1 - 5 = -7

Answer 2

F(x) = 2x - 5
2x = y + 5
x = (y + 5)/2
f⁻¹(x) = (x + 5)/2

g(x) = 3x + 8
3x = y - 8
x = (y - 8)/3
g⁻¹(x) = (x - 8)/3