If m ≤ f(x) ≤ m for a ≤ x ≤ b, where m is the absolute minimum and m is the absolute maximum of f on the interval [a, b], then m(b − a) ≤ b f(x) dx a ≤ m(b − a). use this property to estimate the value of the integral. 2 4 1 x2 dx 0 (smaller value) (larger value)