5. If you were to shade in an x n square on graph paper, you could do it the boring way (with sides parallel to the edge of the paper) or the interesting way, as illustrated below: The interesting thing here, is that a 3 x 3 square now has area 13. Our goal is the find a formula for the area of a nxn (diagonal) square. a. Write out the first few terms of the sequence of areas (assume a₁ = 1, a2 = 5, etc). Is the sequence arithmetic or geometric? If not, is it the sequence of partial sums of an arithmetic or geometric sequence? Explain why your answer is correct, referring to the diagonal squares. b. Use your results from part (a) to find a closed formula for the sequence. Show your work. Note, while there are lots of ways to find a closed formula here, you should use partial sums specifically. c. Find the closed formula in as many other interesting ways as you can.
5. If you were to shade in an x n square on graph paper, you could do it the boring way (with sides parallel to the edge of the paper) or the interesting way, as illustrated below: The interesting thing here, is that a 3 x 3 square now has area 13. Our goal is the find a formula for the area of a nxn (diagonal) square. a. Write out the first few terms of the sequence of areas (assume a₁ = 1, a2 = 5, etc). Is the sequence arithmetic or geometric? If not, is it the sequence of partial sums of an arithmetic or geometric sequence? Explain why your answer is correct, referring to the diagonal squares. b. Use your results from part (a) to find a closed formula for the sequence. Show your work. Note, while there are lots of ways to find a closed formula here, you should use partial sums specifically. c. Find the closed formula in as many other interesting ways as you can.
Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter8: Areas Of Polygons And Circles
Section8.CR: Review Exercises
Problem 40CR: Sue and Daves semicircular driveway is to be resealed, and then flowers are to be planted on either...
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