How do they derive from equation A to B?

[timeforchg]

My question is how to get from equation A to B.
By using partial fractions? differential? any methods?

 

[DonAntonio]

My question is how to get from equation A to B.
By using partial fractions? differential? any methods?

Don't use attachments as it makes very cumbersome reading the question and answering it. Write down the stuff using LaTeX for mathematics.

DonAntonio

 

[chiro]

Hey timeforchg and welcome to the forums

Do you have any conditions? Are you assuming A = B and trying to go from A to B while maintaining an equality?

 

[timeforchg]

Hey timeforchg and welcome to the forums

Do you have any conditions? Are you assuming A = B and trying to go from A to B while maintaining an equality?

yes. I think is more simplifying the equation.

I am trying to find the limit z = 0. When I see inside my text before they use l'hopital rule, they simplified the equation A to B. Thereafter they apply the l'hopital rule

 

[chiro]

Ohh, next time you use a limit please specify this in the equation so there is no ambiguity or confusion.

I have a feeling you have got the equation wrong: if you take the limit in this case to go to zero, the top goes to 0 but the bottom doesn't (it goes to 3-j which may not be zero and is only zero if 3 = j).

 

[timeforchg]

there is no + in eq A for the denominator

 

[chiro]

Can you please write out the expression on the denominator?

 

[timeforchg]

SOLVED! Thanks a lot guys! Appreciate it.