Loser66
  • Loser66
How to calculate it? Please help
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Loser66
  • Loser66
\[(\sum_{k=0}^ \infty \dfrac {E_{2k}}{(2k)!} z^{2k})\sum_{m=0}^\infty \dfrac{(-1)^m}{(2m)!}z^{2m}\]
Loser66
  • Loser66
I need find the coefficients of the product only, but first of, I have to know how to calculate it.
imqwerty
  • imqwerty
hmm can we say that both the series are power series?

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Loser66
  • Loser66
yes, it is
amistre64
  • amistre64
are they orthogonal?
Loser66
  • Loser66
No, those are power series of sec z and cos z
Loser66
  • Loser66
the net is so bad at this end. :)
imqwerty
  • imqwerty
i don't know much about this this may be helpful-http://prntscr.com/90icsv
Loser66
  • Loser66
Thank you so much. Let me try this.
imqwerty
  • imqwerty
:) no prblm B)

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