I think my prof is trying to trip me up. Here is the question(sorry, I don't know the codes to make it in the right form):

Suppose: integrand with b=6 and a=1 of f(x) dx=9, integrand with b=4 and a=6 of f(x) dx=4, then find integrand with b=4 and a=1

does that make any sense? How do I solve this without being given a function??