## Intermediate Value Theorem

### The Intermediate Value Theorem (IVT) is a fundamental result in mathematics that deals with the continuity of a function

The Intermediate Value Theorem (IVT) is a fundamental result in mathematics that deals with the continuity of a function. It states that if a function is continuous on a closed interval [a, b], and it takes on two different values f(a) and f(b) at the endpoints, then it must also take on every value between f(a) and f(b) at some point within the interval.

More formally, let’s say we have a function f(x) that is continuous on the interval [a, b], where a < b. If y is any value between f(a) and f(b), inclusive, then there exists at least one point c in the interval (a, b) such that f(c) = y. In simpler terms, if you can draw a continuous curve without lifting your pen from the paper between two distinct points on the x-axis, then the curve will hit every value in between those points. The Intermediate Value Theorem is important because it guarantees the existence of solutions to certain equations or inequalities. For example, if you have a function f(x) that is continuous on [a, b], and you know that f(a) < 0 and f(b) > 0, then IVT ensures that there exists a value c in the interval (a, b) where f(c) = 0, meaning that the function intersects the x-axis and has a root.

Overall, the Intermediate Value Theorem is a powerful tool that helps us analyze and understand the behavior of continuous functions on intervals, and it provides a way to prove the existence of solutions for various mathematical problems.

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