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Mathematics 13 Online
OpenStudy (anonymous):

a hard question , using the fact that e ^{x} = sum_{n=0}^{infty} x ^{n} /n! determine the sum of e ^{x} = sum_{n=0}^{infty}(-1)^{n+1} 2 ^{n} /6^{n} n!

OpenStudy (anonymous):

tried so hard to find any example about the sum of series like this but couldn't find...

OpenStudy (anonymous):

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