How to multiply two summations together?

NompsypeFeplk 2021-11-21 Answered
How to multiply two summations together?

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Expert Answer

Melinda Olson
Answered 2021-11-22 Author has 1799 answers
For example,
\(\displaystyle{\left({\sum_{{k}}^{\infty}}{a}_{{{k}}}\right)}{\left({\sum_{{k}}^{\infty}}{b}_{{{k}}}\right)}={\sum_{{n}}^{\infty}}{\sum_{{k}}^{\infty}}{a}_{{{k}}}{b}_{{{n}-{k}}}\)
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Tamara Donohue
Answered 2021-11-23 Author has 1876 answers
How exactly did you obtain your result?
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