Binomial theorem — Precalculus, what it means and where it is taught
The rule expanding (a+b)n using combinations as coefficients.
Taught in Precalculus.
Where it is taught
What it rests on
Work through these first if this one does not settle.
- Coefficient — The number multiplying a variable — the 3 in 3n.
- Combination — A selection where order does not matter. C(n,r) = n!r!(n-r)!.