Signals and Systems: Unit II: Analysis of Continuous Time Signals,,

Initial Value Theorem and Final Value Theorem

Explanation about Initial Value Theorem and Final Value Theorem

INITIAL VALUE THEOREM AND FINAL VALUE THEOREM

Initial value theorem

If  then initial value of x(t) is written as


Proof:

Differentiation property of Laplace transform is


Take limit δ → ∞ of the above equation


L.H.S of (2) can be written as


Substitute (3) in (2)


Final Value theorem


Proof:

Differentiation property of Laplace transform is given as,


L.H.S of (2) can be written as


Let us substitute (3) in (2)


Hence proved.

Signals and Systems: Unit II: Analysis of Continuous Time Signals,, : Tag: : - Initial Value Theorem and Final Value Theorem