Dik. Fungsi f(x) mempunyai fungsi invers f^-1 (x) = 1/5 (x-1) dan fungsi g(x) mmpunyai fungsi invers g^-1(x) = 1/2 (3 - x). Tntukan nilai mpada persamaan persamaan berikut. a. (f o g)^-1 (m) = 1 b. (g o f)^-1 (m) = 2 c. (f o g)^-1 (1) = m d. (g o f)^-1 (2) = m
g⁻¹(x) = 1/2(3-x)
(fog)⁻¹(x) = g⁻¹(f⁻¹(x))
=1/2(3-[1/5(x-1)])
= (5x-5) / (30x-32)
(gof)⁻¹(x) = f⁻¹(g⁻¹(x))
= 1/5([1/2(3-x)]-1)
= (6-2x) / (10x-25)
a. (fog)⁻¹(m) = 1
1 = (5m-5) / (30m-32)
30m-32 = 5m-5
25m = 27
m = 27/25
b. (gof)⁻¹(m) = 2
2 = (6-2m) / (10m-25)
20m-50 = 6-2m
22m = 56
m = 56/22
c. (fog)⁻¹(1) = m
m = (5(1)-5) / (30(1)-32)
m = 0/(-2)
m = 0
d. (gof)⁻¹(2) = m
m = (6-2(2)) / (10(2)-25)
m = 2/(-5)
m = -2/5