anonymous
  • anonymous
refer to the sequence S where S subset of n denotes the number of n-bit strings that do not contain the pattern 00. Show that S_n = f_(n+2,) n = 1, 2, …, where ƒ denotes the Fibonacci sequence.
Mathematics
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katieb
  • katieb
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anonymous
  • anonymous
Let's say we have a 2-bit string. If it starts with \(1\) (i.e. the string is \(1x\) where \(x\) is a \(1\) or \(0\)), how may possible strings are there that don't contain \(00\)? What if the string starts with \(0\) (\(0x\))?
anonymous
  • anonymous
Now suppose we have a 3-bit string. How many strings \(1xx\) don't contain \(00\)? How many strings \(0xx\)? The 3-bit strings starting with \(1\) is the same as the total number of 2-bit strings, while the 3-bit strings starting with \(0\) MUST be the same as the number of 2-bit strings that started with \(1\) (otherwise we'd get a string with \(00\)). See where this is going?

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