15 Replies
@Apu
Note for OP
+solved @user1 @user2...
to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.Option 4

whered the +1 come from

@Opt
100 C 0?
For the sum of binomial coefficients, we take from r=0 na?
Yes
Added and subtracted
ah right ok
yea got it
@Opt bhai ye summation aise khulega??

seems fissy
Ok, so i changed the bounds from r=0→100 to r=1→101, so all the r+1 in the term becomes r.
Now, the resulting summation is just the binomial sum for (1+q)^101 leaving out the 101C0 term, so add and subtract that.
OH MA LORD NO WAY BINOMIAL SNEAKED INTO HERE???
THATS INSANE
.....there are binomial coefficients throughout the question. I think it's safe to assume binomial theorem will show up
YEA ILL KEEP IN MIND FROM NOW ON
plus ive done very less question practice of things
fixing that
thanks bro
+solved @Opt
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