9 The Laplace Transform 9.2 The Region of Convergence for Laplace transform Property 1: The Roc of X(s) consists of strips parallel to j-axis in the S-plane Property: For rational Laplace transform, the Roc does not contain any poles Property 3: If x(t is of finite duration and is absolutely integrable, then the roc is the entire s plane9 The Laplace Transform 9.2 The Region of Convergence for Laplace Transform Property1: The ROC of X(s) consists of strips parallel to j-axis in the s-plane. Property2: For rational Laplace transform, the ROC does not contain any poles. Property3: If x(t) is of finite duration and is absolutely integrable, then the ROC is the entire s￾plane