## Quick Reference

From an infinite sequence *a*_{1}, *a*_{2}, *a*_{3},…, an infinite product *a*_{1}*a*_{2}*a*_{3}…can be formed and denoted byLet *P*_{n} be the *n*-th partial product, so that

If *P*_{n} tends to a limit *P* as *n* → ∞, then *P* is the value of the infinite product. For example,has the value ½, since it can be shown that *P*_{n}=(*n*+1)/2*n* and *P*_{n} → ½.

*Subjects:*
Mathematics.