59E

Step by step solution Step 1 of 3 Find the function f(x) that satisfy the relation f(f(x)) = 9x - 8. Step 2 of 3 We see that the degree of function f(f(x)) is one, therefore the degree of function f(x) is also one. Let’s write the function f(x) as ax+b. Now we find the function f(f(x)): f(x) = ax + b f(f(x)) = af(x) + b f(f(x)) = a(ax + b) + b f(f(x)) = a x + ab + b….(1)