A linear homogeneous recurrence relation of degree 2 with constant coefficients is an equation of the form
where c1 and c2 are real numbers with c2 ≠ 0. It is not difficult to show (see [Ro07]) that if the equation r2− c1r − c2= 0 has two distinct roots r1and r2, then the sequence {an}is a solution of the linear homogeneous recurrence relation an = c1an−1+ c2an−2 if and only if for n = 0, 1, 2, …, where C1 and C2 are constants. The values of these constants can be found using the two initial terms of the sequence.
Use mathematical induction to prove Theorem 1.7.
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