I solved it with a different approach for a ,a-1= sigma r=2 to inf r(r-1)/2 (r+1)! a-1= sigma r(r+1) -2(r+1) +2/ 2 (r+1)! After splitting the fractions Now its simple exp. of e
Sir can you give me some tip how to think a question i mean problem solving idea. Like many of aspirants i am also facing this problem in pnc,binomial and complex numbers these kind of chapters. Can you suggest me any book? to see this problem solving ideas.
cofficient of x² ke perspective se sochna mast tha
Difficult hai
Maja a gya👌🏻
Thankyou !
wow what a question
I solved it with a different approach for a ,a-1= sigma r=2 to inf r(r-1)/2 (r+1)!
a-1= sigma r(r+1) -2(r+1) +2/ 2 (r+1)!
After splitting the fractions Now its simple exp. of e
Such a beautiful question ❤.Sir please try to cover more difficult and variety pyqs🙏🙏
Sure will try to cover more PYQs!
thnks sir
Most welcome
Sir please upload more tuff questions of mains like that
Sure!
lovely
I solved by using summation
Sir can you give me some tip how to think a question i mean problem solving idea. Like many of aspirants i am also facing this problem in pnc,binomial and complex numbers these kind of chapters. Can you suggest me any book? to see this problem solving ideas.
If you are 2025 aspirant i would suggest you to solve as many pyqs as possible
@factorialacademy no sir I am 2026 aspirant fortunately I found this channel in 11th
bhaiya asse challenging questions ka koi source baatado jisse tough mains type cater hojye
JEE Mains PYQs 2020-24
These are the types of ques one tends to leave just after a single second.
Aese question pehle bhi aa chuke h mains me jo 2021 ka papers karke gya tha uska ho gya hoga yeh question exam me bas general term likhni aani chahiye
wo paper me pata chalta hai bro
jab time kam aur karne bahut question rehte hai
Bhaiya ,apne x ko 1 se very very small kese man liya coz you have used (x+1)^-1 ka expansion???
Because x was not used in the question.
We have introduced x.
Isliye x ko smaller than 1 maan sakte hai
@factorialacademy ok thanks
It was easy tho
Lalu question