SOLUTION: The first figure takes 5 matchstick squares to​ build, the second takes 13 to​ build, and the third takes 21 to​ build, as can be seen by clicking on the icon below.
​(aâ
Algebra ->
Sequences-and-series
-> SOLUTION: The first figure takes 5 matchstick squares to​ build, the second takes 13 to​ build, and the third takes 21 to​ build, as can be seen by clicking on the icon below.
​(aâ
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Question 1151518: The first figure takes 5 matchstick squares to​ build, the second takes 13 to​ build, and the third takes 21 to​ build, as can be seen by clicking on the icon below.
​(a​) How many matchstick squares will it take to build the 9th ​figure? ​
(b​) How many matchstick squares will it take to build the nth​ figure?
​(c​) How many matchsticks will it take to build the nth​ figure?
Thank you for your help Found 2 solutions by ikleyn, Shin123:Answer by ikleyn(52788) (Show Source):
