Sum of the last 30 coefficients of powers of x in the binomial expansion of (1+x)59 is
see full answer
Your Exam Success, Personally Taken Care Of
1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya
a
229
b
228
c
259-229
d
258
answer is D.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
Let S= some of the last 30 coefficients in (1+x)59=59C30+59C31+…+59C59 (1)Using nCr=nCn−r, we getS=59C29+59C28+…+59C0 (2)Adding (1) and (2), we get2S=59C0+59C1+…+59C59=259⇒S=258