Is there a general formula for antiderivatives the same way there is for derivatives? So, I know th

kolutastmr

kolutastmr

Answered question

2022-06-30

Is there a general formula for antiderivatives the same way there is for derivatives?
So, I know that first-order derivatives can be calculated with the formula:
f ( x ) = lim h 0 f ( x + h ) f ( x ) h
Is there such a limit/standard form for antiderivatives?

Answer & Explanation

Kiana Cantu

Kiana Cantu

Beginner2022-07-01Added 22 answers

Step 1
No, there is no such a limit expression for antiderivatives directly, mainly because antiderivatives of a function are not unique, and how varied the family of antiderivatives also depends on the connectedness of the domain of the function.
Step 2
The fundamental theorem of calculus does state that if f : [ a , b ] R , then a x f ( x ) d x
is an antiderivative of f, and this does have a limit definition. However, this only works in some circumstances, since it relies on the fundamental theorem of calculus.
auto23652im

auto23652im

Beginner2022-07-02Added 5 answers

Step 1
If you are looking for a formula to obtain elementary functions, then the answer is no, there isn't.
If you have an elementary function, its derivative is also an elementary function. This is however not true if you go the other way. There are even many relatively simple such functions, for example e x 2 and sin ( x ) / x.
Step 2
If you are not looking for elementary functions, then for any continuous function f, the function g given by g ( x ) = a x f ( t ) d t is an anti derivative. Here we choose a and x so that the integral is inside the functions domain.

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