diketahui f (x) = x-1 , g (x) = x²-1 dan h (x) = 1/x tentukan : f o (g o h)

jawab

fogoh (x) = f o (goh)
= f { g(h)}
= f { g(1/x)}
= f {(1/x)² -1}
= 1/x² - 1 - 1
= 1/x²  - 2