## IF Ck is the coefficients of x power k in the expansion of (1+x)²⁰⁰⁵ and if a,dare real numbers then 2005 sigma k=0(a+kd).Ck is plz t

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## Answers ( )

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ᴀɴsᴡᴇʀ★## ★

ᴇxᴘʟᴀɪɴᴀᴛɪᴏ★ɴUsing Binomial Theorem

Putting x = 1 in (1),we getDifferenting (1) w.r.t xwe getPutting x = 1, we get

Now

Using (2) and (3),