Given $A_1, A_2, A_3$ are fixed constant, and $A_n = A_{n-1} + A_{n-2} + A_{n-3}$ \newline $n \in N$, and $n \ge 4$. If $A_n = \alpha A_1 + \beta A_2 + \gamma A_3$, then $(\alpha, \beta, \gamma)$?
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Step 1: We can write the first few terms of the sequence: $A_4 = A_3 + A_2 tan^{-1}s$ $A_5 = A_4 + A_3 tan^{-1}s = A_3 + A_2 tan^{-1}s + A_3 tan^{-1}s = A_3(1 + tan^{-1}s) + A_2 tan^{-1}s$ $A_6 = A_5 + A_4 tan^{-1}s = A_3(1 + tan^{-1}s) + A_2 tan^{-1}s + (A_3 + A_2 Show more…
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