Question

f(x) = 3x
g(x) = 4 - 5x
gof^-1(x) = ,?????

caranyaa gmnaaa???

Answer 1

Gof (x)= g(f(x))
g(3x)
4-5(3x)=4-15x
gof^-1= -y+4/15

Answer 2

secara bertahap...
f(x) = 3x dan g(x) = 4 - 5x
gof(x) = g(f(x)) = g(3x)
= 4 - 5(3x)
= 4 - 15x
anggap→ y = 4 - 15x
15x = 4 - y
x = (4 - y)/15
gof^-1(x), ganti y dengan x
gof^-1(x) = (4 - x)/15