f(x)=x+2/x-3. g(x)=x^2-6. tentukan (fog)(x)

jawab

f(x) = (x +2)/ ( x- 3)
g(x)= x² - 6

fog(x) = f { g(x)}
= f (x² - 6)
= (x² -6 +2) /(x² -6 - 3)
= (x² - 4)/(x² -9)