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andyrk
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In the fundamental theorem of calculus, why does f(x) have to be continuous in [a,b] for [itex] F(x) = \int_a^x f(x) dx [/itex]?
Right. That helped alot. Thanks. :)HallsofIvy said:It's hard to answer a question in which the premises are false! There is NO requirement, in the Fundamental Theorem of Calculus (the part that say "if [itex]F(x)= \int_a^x f(t)dt[/itex] then F'(x)= f(x)") that f be continuous. It might that your textbook is proving it with the added assumption that f is continuous because then the proof is easier. But it can then be easily extended to functions that are not continuous.
The Fundamental Theorem of Calculus is a fundamental concept in calculus that links the concepts of integration and differentiation. It states that if a function is continuous on an interval, then the derivative of its integral is equal to the original function.
The Fundamental Theorem of Calculus is used to evaluate definite integrals. By finding the antiderivative of a function and plugging in the upper and lower limits of integration, the value of the definite integral can be determined.
The first part of the Fundamental Theorem of Calculus states that the derivative of the integral of a function is equal to the original function. The second part states that the integral of the derivative of a function is equal to the difference between the values of the function at the upper and lower limits of integration.
The Fundamental Theorem of Calculus is important because it provides a powerful tool for calculating integrals, which are essential in many areas of mathematics and science. It also helps to understand the relationship between differentiation and integration and how these concepts are connected.
The Fundamental Theorem of Calculus only applies to continuous functions. It also does not work for functions that have discontinuities or infinite discontinuities on the interval of integration. Additionally, the function must be differentiable on the interval for the theorem to hold.