Computation Using Integration
In this module, we will learn how to compute various "bulk"
quantities using integrals. First, it may be helpful to
distinguish between
what an integral is,
Definite integrals are the limits of
Riemann sums. ∫baf(x)dx=limn→∞n∑i=1f(x∗i)Δx
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how we compute it,
Definite
integrals are computed using the Fundamental Theorem of Calculus
II: ∫baf(x)dx=F(b)−F(a), where F′(x)=f(x). (Using FTC II
is much easier than computing the limit.) |
and what it is good for:
Definite
integrals are used to find
bulk quantities like area, volume, mass,
population, probability, and work. |
The following video computes some areas in different ways.
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