Mathematics · important
Boundary values of combinations for JEE
Permutations and combinations
Formula
\(\,{}^nC_0={}^nC_n=1,\quad {}^nC_1={}^nC_{n-1}=n\)
Variables: \(n\) is a non-negative integer.
Conditions: Valid for \(n\ge 1\) where needed.
Edge cases in identities and expansions.