Jika f(x) ialah 6x-2 dan g(x) ialah 4x-2, tentukan ( f o g) -1(x) sama dengan ( g -1 o f -1) (x),,, tolong segera dijawab yaa…. please
Jawaban Terkonfirmasi
Diketahui :
f(x) = 6x-2
g(x) = 4x-2
Ditanya :
(f o g)⁻¹(x) = (g⁻¹ o f⁻¹)(x)
Dijawab :
(f o g)(x)
f(g(x)) = f(4x-2) = 6(4x-2) -2
= 24x -12 -2
= 24x -14
(f o g)⁻¹(x) = ….
misal → y = 24x -14
24x = y + 14
x =
(f o g)⁻¹(x) =
(g)⁻¹(x) = ….
misal → y = 4x -2
4x = y + 2
x =
(g)⁻¹(x) =
(f)⁻¹(x) = …
misal → y = 6x -2
6x = y + 2
x =
(f)⁻¹(x) =
(g⁻¹ o f⁻¹)(x)
(g)⁻¹((f)⁻¹(x)) = (g)⁻¹()
⇔ + 2
4
⇔
4
⇔
⇔
jadi (f o g)⁻¹(x) = (g⁻¹ o f⁻¹)(x) TERBUKTI BENAR