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Elements of Communication System on Analog Communications related Questions and Answers


Question :   A function f(x) is even, when?
1. f(x) = -f(x)
2. f(x) = f(-x)
3. f(x) = -f(x)f(-x)
4. f(x) = f(x)f(-x)
Answer :   2 - f(x) = f(-x)  

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