Question

1 1 1 1 2 1 1 3 3 1 1 4 4 6 4 4 1 1 5 10 10 5 1 What are the next two rows? What is this called? What is one example of where this is used?

Answer 1

The two rows are as follows

$\begin{gathered} 1\text{ 6 15 20 15 6 1} \\ 1\text{ 7 21 35 35 21 7 1 } \end{gathered}$

This is called pascal triangle

It can be used to show coefficient of binomial expansion.