# Thread: 1st and fourth product Pi/2 in wallis theroy?

1. ## 1st and fourth product Pi/2 in wallis theroy?

What is the 4th term for the product Pi/2 in wallis theroy? Also whats the 1st product?

I need to know the following...
what is the 4th term for the product Pi/2
what is the1st term for the product Pi/2

This is for a puzzle I need to work out

2. ## Re: 1st and fourth product Pi/2 in wallis theroy?

Wallis product - Wikipedia, the free encyclopedia

Based on that link, the 1st factor is 2, and the 4th factor is 4/5. The 4th partial product is 64/45.