Can anyone help me understand this?
The FTC1 says, basically, that an integral of a function equals the antiderivative of that function, or
If f is continuous on [a, b], then the function g defined by
is continuous on [a, b] and differentiable on (a, b), and .
However, the FTC2 says that , where F is the antiderivative of f.
But why would it be the difference between two antiderivatives rather than just being an antiderivative in itself?