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Signals & SystemsLaplace Transform

For x(t)=-e^(-2t)u(-t), whose transform is 1/(s+2), the ROC is?

  • ARe{s}>-2
  • BRe{s}<-2
  • CRe{s}>2
  • DAll s
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Correct Answer: B. Re{s}<-2
Explanation: The left-sided version has the same algebraic transform but an ROC to the left of the pole: Re{s}<-2.
Reference: Standard signals and systems: laplace transform
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