Circle Division by Lines

Author

Eric W. Weisstein
November 29, 2003

This notebook downloaded from http://mathworld.wolfram.com/notebooks/RecreationalMath/CircleDivisionByLines.nb.

For more information, see Eric's MathWorld entry http://mathworld.wolfram.com/CircleDivisionByLines.html.

©2005 Wolfram Research, Inc. except for portions noted otherwise

Recurrence

RSolve[{f[1]==2,f[n]==n+f[n-1]},f[n],n]

Simplify[2+Sum[k,{k,2,n}]]