Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #2 20131021 08:42:45
Re: geometric seriesTo find the middle term of a G.P. with positive terms, you don’t need to find the common ratio: just multiply the two end terms and take the square root (i.e. take the geometric mean). Last edited by Nehushtan (20131021 22:36:14) 134 books currently added on Goodreads 