Homework 5, due February 17, 2010.

Due Wednesday, February 17, 2010.
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goodwine
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Homework 5, due February 17, 2010.

Post by goodwine »

Reading: Chapter 8 from the course text.

Exercises: 8.1 - 8.8.
Bill Goodwine, 376 Fitzpatrick
jcorona

Re: Homework 5, due February 17, 2010.

Post by jcorona »

Professor,

For problem 8.6, the equation that you ask us to solve is missing.
goodwine
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Re: Homework 5, due February 17, 2010.

Post by goodwine »

jcorona wrote:For problem 8.6, the equation that you ask us to solve is missing.
No it's there, it's x''=0.
Bill Goodwine, 376 Fitzpatrick
jde98

Re: Homework 5, due February 17, 2010.

Post by jde98 »

I'm confused about multiplication of solutions when finding inverse Laplace transforms. The table in the book shows the form for "convolution" and "time multiplication." What's the difference?

Can you factor out table forms and just combine their inverse transforms by multiplying? Or not?
goodwine
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Re: Homework 5, due February 17, 2010.

Post by goodwine »

jde98 wrote:I'm confused about multiplication of solutions when finding inverse Laplace transforms. The table in the book shows the form for "convolution" and "time multiplication." What's the difference?

Can you factor out table forms and just combine their inverse transforms by multiplying? Or not?
Not. The inverse Laplace transform of the product of two functions is NOT the product of the corresponding time functions. You have to do partial fractions. The Laplace transform is linear, so what you are trying to do works for addition and subtraction, but not multiplication.
Bill Goodwine, 376 Fitzpatrick
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