Small but pressing Fourier series question

In summary, a Fourier series is a mathematical representation of a periodic function that breaks it down into simpler components of sines and cosines. Its purpose is to make complex functions easier to analyze and predict. To calculate a Fourier series, coefficients for each term are determined through integration or specific formulas. It differs from a Fourier transform in that it is used for periodic functions and decomposes them into frequency components. Some real-world applications of Fourier series include sound and image processing, data compression, and solving differential equations.
  • #1
toneboy1
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Homework Statement


Please see picture attached


Homework Equations





The Attempt at a Solution


ck = 1/T ∫ a-a x(t).e-jk2pit/T

So x(t) = Ʃk=-∞ (sin(k.a.2pi/T).a-a e-jk2pit/T)/k.pi

but is is supposed to be:

So x(t) = Ʃk=-∞ (sin(k.a.2pi/T).a-a e-jk2pit/T)/k.pi.2.a

but I don't know why?

Thanks
 

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  • #2

What is a Fourier series?

A Fourier series is a mathematical representation of a periodic function as a sum of sines and cosines. It is used to decompose a complex signal into its simpler components and is widely used in signal processing, engineering, and physics.

What is the purpose of a Fourier series?

The purpose of a Fourier series is to break down a complex function into simpler components that can be analyzed more easily. It allows us to understand the behavior of a function and make predictions about its future behavior.

How do you calculate a Fourier series?

To calculate a Fourier series, you need to find the coefficients for each term in the series. This can be done using integration or by using specific formulas depending on the type of function. Once the coefficients are determined, the series can be written and used for analysis.

What is the difference between a Fourier series and a Fourier transform?

A Fourier series is used for periodic functions, while a Fourier transform is used for aperiodic functions. A Fourier series decomposes a function into its periodic components, while a Fourier transform decomposes a function into its frequency components.

What are some real-world applications of Fourier series?

Fourier series has a wide range of applications in fields such as signal processing, engineering, physics, and mathematics. It is used for sound and image processing, data compression, solving differential equations, and many other applications that involve analyzing complex functions.

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