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Recurrence Relationshard
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For the recurrence an=7an−1−12an−2a_n = 7a_{n-1} - 12a_{n-2}an​=7an−1​−12an−2​, the characteristic equation is r2−7r+12=0r^2 - 7r + 12 = 0r2−7r+12=0. By Vieta's formulas, if r1r_1r1​ and r2r_2r2​ are the roots, which is correct?