uppose that the sequence x0, x1, x2... is defined by xo = 3, x₁ =0, x₂=5, and xk+3 = 13xk+1+12x for k20. Find a general formula for xx. Be sure to include parentheses where necessary, e.g. to stinguish 1/(2k) from 1/2k. k = 0

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