Question

The numbers​ x, y, and z are in a​ Fibonacci-type sequence. If z equals x+​y, use...

The numbers​ x, y, and z are in a​ Fibonacci-type sequence. If z equals x+​y, use deductive reasoning to find all triples​ x, y, and z that make an arithmetic sequence as well as consecutive terms in a​ Fibonacci-type sequence. Assume that​ x, y, and z are the first 3 ordered terms in a​ Fibonacci-type sequence and in an arithmetic. sequence.

The difference between the first two terms in the sequence is...?

Homework Answers

Answer #1

(as they are in a Fibonacci type sequence)

Also, as they are in an arithmetic sequence, we must have (their difference is constant)

So that

Substituting in we get

And so we have

Therefore, we have

The difference between the first two terms in the sequence is (the first term itself)

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