Chapter B.3, Problem 35E

The triangle shown here is called Pascal’s triangle. Can you guess what the next two rows at the bottom are? Compare these numbers with the coefficients of binomial expansions.

$\begin{array}{ccccccccc}& & & & 1& & & & \\ & & & 1& & 1& & & \\ & & 1& & 2& & 1& & \\ & 1& & 3& & 3& & 1& \\ 1& & 4& & 6& & 4& & 1\end{array}$