We now list several properties of definite integrals; though the proofs are not difficult, we will not give them here. They can be verified intuitively by considering the relevant areas.
|f (x)dx + g(x)dx = f (x) + g(x)dx|
|cf (x)dx = cf (x)dx|
|f (x)dx + f (x)dx = f (x)dx|
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