Riemann Sum Limit of Exponential Function e^x for Integral (0, 1)

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SUMMARY

The discussion focuses on evaluating the integral of the exponential function \( f(x) = e^x \) over the interval (0, 1) using Riemann sums. The user correctly identifies the Riemann sum formula and calculates \( \Delta x = \frac{1}{n} \) and \( x_i^* = \frac{i}{n} \). The expression for the Riemann sum is established as \( \frac{1}{n} \sum_{i=1}^{n} e^{\frac{i}{n}} \). The user seeks guidance on the appropriate summation formula to simplify this expression, indicating a need for knowledge about geometric series.

PREREQUISITES
  • Understanding of Riemann sums and their application in calculus.
  • Familiarity with the properties of the exponential function \( e^x \).
  • Knowledge of summation techniques, particularly geometric series.
  • Basic calculus concepts, including limits and integrals.
NEXT STEPS
  • Study the derivation and application of the geometric series formula.
  • Learn about the properties of limits in the context of Riemann sums.
  • Explore techniques for evaluating limits involving exponential functions.
  • Investigate numerical integration methods for approximating definite integrals.
USEFUL FOR

Students studying calculus, particularly those focusing on integral evaluation and Riemann sums, as well as educators looking for examples of applying summation techniques to exponential functions.

Dissonance in E
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Homework Statement


evaluate integral (0, 1) f(x)=e^x


Homework Equations


integral (a,b) f(x) dx = lim n-> infinity, sum of (i = 1, n) f(xi*)Deltax
where :
delta x = b-a/n
xi*= a+(delta xi)

The Attempt at a Solution



Deltax= 1-0/n = 1/n

xi*=0+(1/n)i = i/n

f(xi*)Deltax = (e^(i/n)) (1/n)

SUM OF:(e^(i/n)) (1/n)

(1/n) SUM OF:((e^(i/n))

i hope i was somewhat correct up till this point. Now i have no idea what summation formula to use here as the basic k=kn , i=n(n+1)/n and i^2=n(n+1)(2n+1)/6
dont seem to be very useful.
 
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The formula for the sum of a geometric series would be useful.
 

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