Question

(fog) si f(x)=x²-x-1 y g(x)=√x-1 .

Answer 1

entoces aremos lo siguiente

(fog)(x)= f [ g(x) ] =  f[√x-1]

(fog)(x)=√x-1² - √x-1-1

(fog)= x-1 - √x-1-1