# Question #56ea9

##### 1 Answer

Mar 1, 2017

The first and second fundamental theorems of calculus are ordered differently by different people and textbooks.

But here they are.

In words, it means that **you can evaluate an integral of a derivative from A to B by subtracting the value of the function at A from the value at B**.

**It also means that the derivative of an integral is the function.** If the bound is a function of x (for example not from a to x but from a to x^2), then you have to times the function by the derivative.