General term of (a+b)^n (T_{r+1} = nCr · a^(n−r) · b^r)
jee-mainjee-advanced
T_{r+1} = nCr · a^(n−r) · b^r
What each symbol means
| Symbol | What it stands for |
|---|---|
| n | Non-negative integer degree |
| r | Index in sum; displayed term index is r+1 |
| a,b | Commuting bases |
When to use this
n ∈ ℕ; standard commutative expansion.