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In the Table of Laplace Transforms (end of Chapter 8, page 469), verifyΓthe function results for L5 and L6. Also show thatL(1/t)=π/p.

Short Answer

Expert verified

The following are proved:

(a)The Gamma functionΓ results for L5,L6.

(b)L(1/t)=Ï€/p

Step by step solution

01

Given Information

The value of a common Gamma function of 12.

Γ12=π

02

Definition of a Gamma function

The Gamma Function is defined as
Γ(p)=∫0∞xp-1e-xdx,p>0

03

Begin with the definition of the Gamma function.

Start with the definition of a Gamma Function.

Γ(p)=∫0∞xp-1e-xdx,p>0

Make the following substitutions in this definition.

u=ptt=updt=dup

Simplify after substitutions.

∫0∞upke-udup=1pk+1∫0∞uke-udu=1pk+1Γ(k+1)

04

Repeat the process for different substitutions

Make the following substitutions in the definition.

u=(a+p)tt=ua+pdt=du(a+p)

Simplify after making the substitutions.

∫0∞ua+pke-udua+p=1(a+p)k+1∫0∞uke-udu=Γ(k+1)(a+p)k+1

05

Repeat the process again for another substitution

Make the following substitutions in the definition.

u=ptt=updt=dup

Simplify after making the substitutions.

∫0∞up-1/2e-udup=∫0∞u-1/2e-udu=Γ12p1/2=πp

Hence the given statement is proved.

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