GATE EC 2014 Set 1 — Question 37
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Signals & Systems → Continuous-Time Signals → Fourier Transform & Properties
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Question
For a function , it is given that for any real value . If , then is
Correct answer
(B) -j
Solution
Given the Fourier Transform of is .We are given . According to the integration property of the Fourier Transform:First, find :
.Substituting into the expression for :The integral of over all time is equal to the value of its Fourier Transform at :Evaluating :Therefore, .
.Substituting into the expression for :The integral of over all time is equal to the value of its Fourier Transform at :Evaluating :Therefore, .
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