A formula that allows one to expand a trinomial expression raised to a power using the trinomial coefficients. It is written as (a + b + c)^n = ∑[p+q+r=n] (n choose p,q,r) a^p b^q c^r.
A formula that allows one to expand a trinomial expression raised to a power using the trinomial coefficients. It is written as (a + b + c)^n = ∑[p+q+r=n] (n choose p,q,r) a^p b^q c^r.