Algebra-2

To fill in the missing numbers in Pascal's Triangle, we need to understand the rule for constructing the triangle.

Rule for Pascal's Triangle

Each number in Pascal's Triangle is the sum of the two numbers directly above it in the previous row.

Let's analyze the rows where we have missing numbers:

1. For the fourth row:

The elements of the fourth row are obtained by adding the elements of the third row.

The third row is 1 2 1. To get the...