Show that the characteristic equation for the recurrence relation where a is a non-zero constant, has two

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Show that the characteristic equation for the recurrence relation

Xn+22axn+1 + ax = 0,

where a is a non-zero constant, has two equal roots λ = a.

(a) Verify (by substituting into the relation) that xn = (A + Bn)an is a solution for all constants A and B.

(b) Find the particular solution which satisfies x0 = 1, x1 = 0. (Your answer will involve a, of course.)

(c) Find the particular solution for which x0 = 3, x10 = 20.

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