show that if "f" is integrable then f(x) is less then or equal to 0 on [a,b] is equal to the integral from a to b of f(x) dx is greater then or equal to 0
show that if "f" is integrable then f(x) is less then or equal to 0 on [a,b] is equal to the integral from a to b of f(x) dx is greater then or equal to 0
Please try to ask the question more clearly, that is incomprehensible.
show that if "f" is integrable then f(x) is less then or equal to 0 on [a,b] is equal to the integral from a to b of f(x) dx is greater then or equal to 0
Since fits the conditions and assume , then this cannot be true in general.