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# Definite Integral as the Limit of a sum BrainMass Expert explains

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Calculus
Integral Calculus(I)
Definite Integral as the Limit of a sum
Method of Summation
Definite Integral

It is an explanation for finding the integral by using the method of summation(part I).

Find by the method of summation the value of:

(a) ∫ e^( - x)dx, where the lower limit is a and the upper limit is b,
i.e., integral of e^( - x), where the lower limit is a and the upper limit is b.
(b) ∫ e^( kx)dx, where the lower limit is a and the upper limit is b,
i.e., integral of e^( kx), where the lower limit is a and the upper limit is b.

https://brainmass.com/math/integrals/definite-integral-limit-sum-brainmass-expert-explains-41653

#### Solution Preview

Calculus
Integral Calculus(I)
Definite Integral as the Limit of a sum
Method of Summation
...

#### Solution Summary

This solution is comprised of a detailed explanation for finding the value of the definite integral by
using the method of summation. It contains step-by-step explanation.

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