## Fundamental Theorem of Calculus

### The Fundamental Theorem of Calculus is a fundamental result in calculus that establishes a connection between the concepts of differentiation and integration

The Fundamental Theorem of Calculus is a fundamental result in calculus that establishes a connection between the concepts of differentiation and integration. It consists of two parts: the first part relates the derivative of an integral to the original function, and the second part allows us to evaluate definite integrals using antiderivatives.

Part 1 states that if a function f(x) is continuous on a closed interval [a, b] and F(x) is an antiderivative of f(x) on that interval, then the derivative of the definite integral of f(x) from a to x is given by F'(x). Symbolically, it can be represented as:

d/dx ∫[a to x] f(t) dt = F(x)

In simpler terms, this means that if we have a function f(x) and its antiderivative F(x), then the rate of change of the definite integral of f(x) from a to x is equal to the value of F(x). This provides a powerful tool to calculate the derivative of an integral without directly evaluating it.

Part 2 establishes the relationship between integration and antiderivatives. It states that if f(x) is a continuous function on a closed interval [a, b] and F(x) is any antiderivative of f(x) on that interval, then the definite integral of f(x) from a to b is equal to the difference between the antiderivative evaluated at the endpoints:

∫[a to b] f(x) dx = F(b) – F(a)

In other words, to calculate the value of a definite integral between two points a and b, we can find any antiderivative of the integrand and evaluate it at the endpoints, subtracting the value at a from the value at b.

The Fundamental Theorem of Calculus is of great importance in calculus as it provides a deep connection between the concepts of differentiation and integration, allowing us to compute integrals and find antiderivatives efficiently.

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