this quadrilateral has not sense, because must to serve: DA+CB=DC+AB, but whit data: 4n+6=4n+7 <=> 6=7?

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- September 30th 2008, 09:07 AM #1

- Joined
- Nov 2006
- Posts
- 152

## f (n)

Refer to the diagram of the circle inscribed in a

quadrilateral ABCD with the points of tangency at M, N, P,

and Q. For each positive integer n, a diagram is drawn like

this in which lengths of line segments are

AQ = AM = n,

BM = BN = n + 1,

CN = CP = n + 2, and

DP = DQ = n + 3.

The radius of the circle is , where is a

polynomial function in n.

Find

- October 5th 2008, 04:23 PM #2