Ram Prasath posted an Question
June 03, 2021 • 17:19 pm 30 points
  • IIT JAM
  • Physics (PH)

Friends could anybody explain this?

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  • Lakshay bhardwaj best-answer

    you just need to remember the expansion of exp(-x). and compared it with final expansion of series .

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    thank you for your support

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    1 small doubt : in 3rd step how (2n+1)! became (2n)!

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    using property of factorial

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    u can mark my answer as best answer if u like that ,thank you

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    actually i tried to convert as best answer. but i couldn't. i don't know y

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