Middle term(s) in $(a+b)^n$ (Even n: single middle term at r=n/2. Odd n: two middle terms r=(n±1)/2.)
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Even n: single middle term at r=n/2. Odd n: two middle terms r=(n±1)/2.
What each symbol means
| Symbol | What it stands for |
|---|---|
| n | Expansion degree |
When to use this
Positive integer n.