The given function is f (x) = x2-4x-3
f, being a polynomial function, is continuous in [1, 4] and is differentiable in (1, 4) whose derivative is 2x − 4.
Mean Value Theorem states that there is a point c∈ (1, 4) such that f'( c) =1
Hence, Mean Value Theorem is verified for the given function.