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This article gives several methods for finding and proving the well known formula of the Fibonacci sequence. In these methods, we employ many
topics ranging from high-school mathematics to university mathematics. The topics we use include geometric sequences, generating functions and some topics in linear algebra.
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 S. R. Ghorpade and B. V., Limaye, “A Course in Calculus and Real Analysis,” Undergraduate Texts in Mathematics, Springer, 2006.
 W. Watkins, “Generating Functions,” The College Mathematics Journal, vol. 18, no. 3, January, pp. 195-211, 1993.