4. Assume f and |fl are both integrable on la, b], a < b, show f(x) dx sf( d. Hint: there are several approaches. One good way is to apply the triangle inequality of series TL T& a where a, E...
4. Assume f and |fl are both integrable on la, b], a < b, show f(x) dx sf( d. Hint: there are several approaches. One good way is to apply the triangle inequality of series TL T& a where a, E R, ail s on the Riemann sums.
4. Assume f and |fl are both integrable on la, b], a