What area does the antiderivative represent? Consider the antiderivative of the function

Craig Mendoza

Craig Mendoza

Answered question

2022-06-22

What area does the antiderivative represent?
Consider the antiderivative of the function e x ,, which is e x .. Evaluating the antiderivative at the value 0 produces -1.
I was taught to conceptualize an antiderivative as an area under a curve, or a sum of progressively smaller approximate sections.
But clearly, -1 cannot represent the area under under the e x curve from 0 to 0, 0 to , or to 0 when you consider that the function is positive for all values of x.
Then what sum or area does the value of the antiderivative of e x actually represent?

Answer & Explanation

Reagan Madden

Reagan Madden

Beginner2022-06-23Added 15 answers

Explanation:
Evaluating the antiderivative at the value 0 produces −1. Now, I was taught to conceptualize an antiderivative as an area under a curve
1. An antiderivative F results from performing indefinite integration on a function f.
2. For a < b ,, the signed area (i.e., the area residing in the positive vertical region minus the area residing in the negative vertical region) enclosed by the curve y = f ( x ) ,, the x-axis, and the lines x = a and x = b is given by the definite integral a b f .
3. By the Fundamental Theorem of Calculus, the above signed area a b f
= F ( b ) F ( a ) .
4. The actual area enclosed by the curve y = f ( x ) ,, the x-axis, and the lines x = a and x = b is given by a b | f | ,, which does not equal F ( b ) F ( a ) .
5. In your Question, the value evaluation F ( 0 ) = 1 does not correspond to an area.

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