1. The Fibonacci numbers are defined by F1 = 1, F2 = 1, F3 = F1+F2 = 2, and, in general, for n > 3, Fn = Fn-1+ Fn-2. Thus, the Fibonacci sequence is 1,1,2, 3, 5, 8, 13, 21, 34, .... What is the sum %3D F1 + F3 + ... + F2n+1? and the sum F2 + F4 + ...+ F2n? Prove your answers by induction on n. 2. Show that (i) 2| Fn 3| n, (ii) 3| Fn 4|n, (iii) 4 | Fn + 6 | n. Hint: For example in case (ii), write Fn = 3qn + rn with 0 < rn < 3 and consider how the Tn's are related.
1. The Fibonacci numbers are defined by F1 = 1, F2 = 1, F3 = F1+F2 = 2, and, in general, for n > 3, Fn = Fn-1+ Fn-2. Thus, the Fibonacci sequence is 1,1,2, 3, 5, 8, 13, 21, 34, .... What is the sum %3D F1 + F3 + ... + F2n+1? and the sum F2 + F4 + ...+ F2n? Prove your answers by induction on n. 2. Show that (i) 2| Fn 3| n, (ii) 3| Fn 4|n, (iii) 4 | Fn + 6 | n. Hint: For example in case (ii), write Fn = 3qn + rn with 0 < rn < 3 and consider how the Tn's are related.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter2: The Integers
Section2.2: Mathematical Induction
Problem 55E: The Fibonacci sequence fn=1,1,2,3,5,8,13,21,... is defined recursively by f1=1,f2=1,fn+2=fn+1+fn for...
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