Hence the matrix Q associated is given by
the generating matrix of k-Pell sequence. Now, we shall find the entries of expressed with
some terms of the k-Pell-Lucas sequence. Using the identities of previews section,
if we subtracting (6)-(7), we obtain that
Using (8) in the entries of T we can conclude that
Proof: We shall use induction on n
initial conditions of sequence. Suppose now that (9) is valid for n
and using (2),then we get that
as required. ∎
Using the properties involving the determinant of the matrices Q and Q and
doing some calculations, we can obtain the Cassini’s identity.