Suppose there exists no c in zone [a,b], which gives us g(c)=0
h is therefore defined and differentiable for all x in [a,b] ...
let me ask you this one..
we got f(x), g(x), in both there is differentiation.
for all x, we know: ≠
we also know there are:
we need to prove that there is a point 'c', in zone [a,b], which gives us g(c)=0.
please help !