We know that the relationship between set with n Cardinality named A and Binomial Coefficient is all about subsets of the set A.
Binomial Coefficients describes Cardinality of subsets for A set.
But what about Trinomial Coefficient?
If cardinality of A equals 4.
We can wright down the Trinomial Coefficients in one line as we do normally for Binomial Coefficients!
But it is easy to see whats going on, if we will wright those coefficients not in one line, But in one plane.
There is 15 number which defines cardinality of 15 different sets.
My question is: What are those sets?!
My question is: What is the relationship between those unknown sets and set named by A?
All this means that we have a set A with 4 elements and we must find out 15 sets with their own elements.