This concept is explained concisely by IITianFaculty.
Any Time Padhai Academy
(ATP Academy provides awesome content for students Preparing for IIT JEE & NEET).
It is founded by IIT graduate Vineet Khatri which is famous name among thousands of students all over India. Thousands of IITians have been made under his mentorship.
Like ATP Academy on Facebook
https://web.facebook.com/Any-Time-Padhai-Academy-1034624919960861/
& Follow Vineet Khatri on Facebook
https://web.facebook.com/vineetkhatrivk/?fref=ts
source
RC sir 11th maths k VIDEOS bhi upoad kr dijiye
Nice sirrrr
Sir which book is good for iit please make a video