Double Sigma Concepts and Problems for JEE Main | JEE Advanced

[@saarthaksabharwal]

I had a basic idea of the concept from RBCs but was always stuck at some problems like this one... this approach is very intuitive and I am more hopeful that I won't leave these problems out in the exam. Thanks sir :)

[@Trio_0_0]

Revised the concept quickly!
Thanks a bunch sir!😄

[@sahasransu5086]

bohot problem hota tha aise ques mein , ab samjh aa gya

[@ujjawaldubey-wp4tt]

Obviously the most simple explanation I could have on this topic really got a value for my exam😊

[@someshpatil6450]

thank you sir, today i got to knew this new method!..

[@mayank00005]

Please upload more such videos ❤️these videos are very helpful for revising the rbc concepts again 🔥

[@ayan_samanta_45]

Thank you sir very useful video.❤❤

[@abhishekiistian]

very in-depath concept

[@piyushprasad8557]

thank you sir 😊😊❤

[@purukashyap8586]

Thank you, sir, for the amazing content

[@preritagrawal]

Thank You Sir !

[@DalordCB]

main problem the I faced while solving qns of Double sigma was understanding the inequalities and you simply cleared all my doubts and conceptual mistakes made by me ty so much sir

[@Piskit709]

Thank you sir

[@Rajyadav-yh3rz]

bade wala thankuuuuu for the concept

[@operatorpagal1448]

Sir aise hi kuch problem mujhe nahi aa rahe the cengage me matrix match thanks sir aur complex number ke sath binomial ke sath Sigma wale problem discuss karna sir cengage ke comprehension ke

[@MatrixEscape54]

thx sir best revision

[@ghhhhhhhhhhhhhhhhhhu]

Aaj he test me similar type ka question aaya tha

[@ayushmanpandey9307]

great teacher to be fair

[@PaaritoshMittal]

💯💯

[@shivakesharwani2541]

Op concept 😍😍

[@study-junction02]

15:37 , but sir question me to i & j me equality bhi h
So the final answer will be
(2nCn)/2 + (-2nCn) = (-1/2)(2nCn)

[@Akashsinha_]

Sir ek video pie wale bhi daliyega plzz

[@shivanisikheriya5715]

Thanks sir.. Revising the concept...

[@kabirthakur5366]

Thank you very much sir

[@divyanshupandey8842]

mja agaya sir op

[@goravgupta9334]

Marvellous

[@talantmarkov2073]

Great

[@Yash_Maradiya.09.]

sir -1 direct bahar kaise nikal liya sigma se?

[@study-junction02]

Becoz 2i -1 represents odd number , if i€Z
so there is odd power of -1 and it will be -1, which is constant so we can take it out of summation

[@abhishekiistian]

100th like is mine

[@vineetloombasir]

Thanks 😊

[@Swarnavaaa]

Sir, When will UDAAN 4.0 launch? I will join it in my 11th for JEE 2026

[@vineetloombasir]

2026 batch start 16th December by name Early growth batch. Use code VINEETLIVE and subscribe Unacademy with discounts.

[@Swarnavaaa]

@@vineetloombasir sir but we have our CBSE boards from Feb....how can we join? Is there any batch starting from March or April? (Like previous years...)

[@Swarnavaaa]

@@vineetloombasir sir please reply

[@vineetloombasir]

Many batches are launched at regular intervals

[@Swarnavaaa]

@@vineetloombasir sir, I am Swarnava. Yesterday I had joined your class on Unacademy and you said me to complete orientation and other classes before joining....so, I have now completed all those. And also I have done IIT-JEE foundation in 8th and 9th...so, Sir am I now eligible to join your next class?

[@carryminnnnati]

12:00

[@anishtakshak6515]

Thank you sir🙂

[@AnjaliAparadh]

Thank you very much sir 🙏