Q

arre iskobhi dekho koi........ye bhi Q hi hai...bhoot thore hi haii

HINT
http://targetiit.com/iit_jee_forum/posts/some_series_expansions_3335.html

us link mei se directly kuch Nahi milega.....

u gotta think guyz.......

apply to diff values in sum formula frm ther....

HINT : THOSE 2 values shud b equal in magnitude opp osite in sign.......... then take their sum!!

Ans should be B

we know the e expansion

e^x=1+ x + x^2/2! + x²/3! + ...

e^1/2=1 + 1/2 +1/2²*2! + 1/2³*3! + ....

e^-1/2=1 -1/2 +1/2²*2! - 1/2²*3! + ...

adding both and dividing by 2 we get answer

[9][9][9]
abhishek tera intuitionistic logic failho gaya
bas (D) kikami thi
[9][9][9]

Shit...

u are right... [1]

i subtracted them....

[2][2][2]