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A mathematician has devised a theorem that produces a series of numbers$$s_1,s_2…s_xaccording to the principless_1=2,s_2=2,s_3=2$$, and for x ≥ 4,$$s_x=2s_(x–1)+s_(x–2)$$. Which of the following equals s_6 ?
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以上解析由 考满分老师提供。
