Antiderivatives Are Unique up to a Constant | Massachusetts Institute of Technology - Edubirdie

University:
Massachusetts Institute of Technology
Course:
18.01SC | Single Variable Calculus
Academic year:

2024
Views:

354

Pages:

1
Author:

nickigioloy

Antiderivatives are Unique up to a Constant Theorem: If F � (x) = f (x) and G� (x) = f (x), then F (x) = G(x) + c. In other words, once we’ve found one antiderivative of a function we know that any other antidervative we might ﬁnd will only diﬀer from it by some added constant. Proof: If F � = G� then (F − G)� = F � − G� = f − f = 0. Recall that we proved as a corollary of the Mean Value Theorem that if a function’s derivative is zero then it is constant. Hence G(x) − F (x) = c (for some constant c). That is, G(x) = F (x) + c. This is a very important fact. It’s the basis for calculus; the reason why it makes sense to do calculus at all. This theorem tells us that if we know the rate of change of a function we can ﬁnd out everything else about the function except this starting value c.

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