The 4th number in the 32nd row of pascals triangle is the sum of how many triangular numbers?
1 Answer
Nov 5, 2017
Explanation:
First, we must find the fourth number of the thirty-second row of Pascals. That can be found with:
However, I won't find the number just yet. In a minute, you'll see why.
Next, we need to know the formula for the sum of triangular numbers. This is:
Now, we need to find a value of
However, I can simply reorder the right hand side to look like this:
Now, it's easy to notice that