Discrete Math Quiz
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RECURRENCE RELATIONS
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Consider the recurrence jn=kjn−1+ℓjn−2j_n = kj_{n-1} + \ell j_{n-2} where k>0k > 0 and ℓ<0\ell < 0. If one characteristic root is r1=4r_1 = 4 and the other root r2r_2 satisfies ∣r2∣<1|r_2| < 1, which constraint must hold?
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